Charge pump circuit, modulation method of charge pump circuit and non-volatile memory chip

Abstract

The present application relates to the field of circuit control technology, and discloses a charge pump circuit, a modulation method of the charge pump circuit, and a non-volatile memory chip. The mode control module in the charge pump circuit is connected to the charge pump module and the modulation module, and receives a mode selection signal. The output end of the mode control module is connected to the input end of the modulation module and serves as the second output end of the charge pump circuit. Based on the output of the charge pump module and the mode selection signal, the mode control module outputs a corresponding sampling signal to the modulation module. Through the feedback modulation of the modulation module and the charge pump module, the sampling signal is modulated and stabilized to a second voltage at the second output end for output, and the charge pump module stably outputs a first voltage matching the second voltage at the first output end. By the above method, two identical or different voltages can be output, thereby reducing the number of charge pump circuits in the non-volatile memory chip, and thus reducing the power consumption and cost of the non-volatile memory chip.

Description

Technical Field

[0001] This application relates to the field of circuit control technology, and particularly to a charge pump circuit, a modulation method for a charge pump circuit, and a non-volatile memory chip. Background Art

[0002] A non-volatile memory chip is a common type of memory, which has the characteristic of non-volatility. Inside the non-volatile memory chip, there is usually a memory array composed of several memory cells.

[0003] The external controller sends relevant instructions to the non-volatile memory chip to complete data writing or reading. When the non-volatile memory chip performs various operations, it usually needs to apply multiple voltages to the memory cells. For example, different operations may require multiple different voltages, or a single operation may also require multiple different voltages, or additional voltages are needed to complete the transmission during the process of transmitting the operating voltage to the memory cells, etc.

[0004] The inventors have found through research that the above voltages are usually provided by the charge pump circuit inside the memory chip. However, a single charge pump circuit can only provide one output voltage. Therefore, existing memory chips usually need to set multiple charge pump circuits inside to generate multiple different voltages, which will undoubtedly greatly consume the area and power consumption of the chip, thus greatly affecting the performance of the chip. Summary of the Invention

[0005] The main technical problem to be solved by this application is to provide a charge pump circuit, a modulation method for a charge pump circuit, and a non-volatile memory chip, which can output two identical or different voltages, thereby reducing the number of charge pump circuits in the non-volatile memory chip, and thus reducing the power consumption and cost of the non-volatile memory chip.

[0006] To solve the above problems, a technical solution adopted by this application is to provide a charge pump circuit, including: a charge pump module, wherein the output end of the charge pump module is used as the first output end of the charge pump circuit; a modulation module for providing a feedback signal to the charge pump module to modulate and stabilize the output of the charge pump module; a mode control module connected to the charge pump module and the modulation module, and receiving a mode selection signal, the output end of the mode control module is connected to the input end of the modulation module and used as the second output end of the charge pump circuit; wherein, based on the output of the charge pump module and the mode selection signal, the mode control module outputs a corresponding sampling signal to the modulation module, and through the feedback modulation of the modulation module and the charge pump module, the sampling signal is modulated and stabilized into a second voltage for output at the second output end, and the charge pump module stably outputs a first voltage matching the second voltage at the first output end.

[0007] Among them, the mode control module includes multiple control branches, and each control branch is respectively connected between the output end of the charge pump module and the input end of the modulation module; among them, the mode control module selects a corresponding control branch to conduct based on the received mode selection signal, so as to output a corresponding sampling signal to the modulation module, and through the feedback modulation of the modulation module and the charge pump module, the sampling signal is modulated and stabilized into a second voltage at the second output end for output, and the charge pump module outputs a first voltage matching the second voltage at the first output end.

[0008] Among them, the mode control module includes a first control branch and a second control branch, which are respectively connected between the output end of the charge pump module and the input end of the modulation module. Among them, the first control branch includes n clamping elements connected in series, and the second control branch includes a switching element to receive the mode selection signal; where n is a natural number and n≥1; where, when the switching element is turned off based on the mode selection signal, the first control branch conducts between the output end of the charge pump module and the input end of the modulation module, and the charge pump circuit outputs a modulated second voltage at the second output end based on the conducting first control branch, and outputs a first voltage matching the second voltage at the first output end, and the first voltage is the sum of the second voltage and the voltage consumed by the n clamping elements; when the switching element is turned on based on the mode selection signal, the second control branch conducts between the output end of the charge pump module and the input end of the modulation module, and the charge pump circuit outputs a modulated second voltage at the second output end based on the conducting second control branch, and outputs a first voltage matching the second voltage at the first output end, where the first voltage and the second voltage are the same.

[0009] Among them, the mode control module includes a first control branch, a second control branch, and a third control branch, which are respectively connected between the output end of the charge pump module and the input end of the modulation module. Among them, the first control branch includes n clamping elements connected in series and a first switch; the second control branch includes m clamping elements connected in series and a second switch. Among them, n and m are natural numbers respectively, n≥1, m≥1, and m is not equal to n; the third control branch includes a third switch. When the first switch, the second switch, and the third switch select the first control branch to conduct between the output end of the charge pump module and the input end of the modulation module based on the mode selection signal, the charge pump circuit outputs a modulated second voltage at the second output end based on the conducted first control branch, and outputs a first voltage matching the second voltage at the first output end. The first voltage is the sum of the second voltage and the voltages consumed by n clamping elements. When the first switch, the second switch, and the third switch select the second control branch to conduct between the output end of the charge pump module and the input end of the modulation module based on the mode selection signal, the charge pump circuit outputs a modulated second voltage at the second output end based on the conducted second control branch, and outputs a first voltage matching the second voltage at the first output end. The first voltage is the sum of the second voltage and the voltages consumed by m clamping elements. When the first switch, the second switch, and the third switch select the third control branch to conduct between the output end of the charge pump module and the input end of the modulation module based on the mode selection signal, the charge pump circuit outputs a modulated second voltage at the second output end based on the conducted third control branch, and outputs a first voltage matching the second voltage at the first output end. Among them, the first voltage and the second voltage are equal.

[0010] Among them, the charge pump module includes a first charge pump unit and a second charge pump unit connected in cascade. Among them, the output end of the second charge pump unit serves as the output end and the first output end of the charge pump module, and the node between the first charge pump unit and the second charge pump unit serves as the intermediate output end of the charge pump module. The mode control module includes a first control branch, a second control branch, and at least one clamping control branch. The first control branch is connected between the output end of the charge pump module and the input end of the modulation module. The second control branch is connected between the intermediate output end of the charge pump module and the input end of the modulation module. At least one clamping control branch is connected between the first control branch and the second control branch. Among them, the mode control module selects the first control branch to conduct based on the received mode selection signal, or the second control branch and a clamping control branch to conduct, so as to output a corresponding sampling signal to the modulation module, and through the feedback modulation of the modulation module and the charge pump module, the sampling signal is modulated and stabilized to a second voltage at the second output end for output, and the charge pump module outputs a first voltage matching the second voltage at the first output end.

[0011] Among them, the first control branch includes a first switch, the second control branch includes a second switch, and at least one clamping control branch includes a first clamping control branch. The first clamping control branch includes n clamping elements connected in series and a third switch. Here, n is a natural number and n≥1. When the first switch, the second switch, and the third switch are selected based on a mode selection signal to turn on the first control branch between the output terminal of the charge pump module and the input terminal of the modulation module, the charge pump circuit outputs a modulated second voltage at the second output terminal based on the turned-on first control branch, and outputs a first voltage matching the second voltage at the first output terminal. The first voltage and the second voltage are equal. When the first switch, the second switch, and the third switch are selected based on a mode selection signal to turn on the second control branch and the first clamping control branch between the output terminal of the charge pump module and the input terminal of the modulation module, the charge pump circuit outputs a modulated second voltage at the second output terminal based on the turned-on second control branch and the first clamping control branch, and outputs a first voltage matching the second voltage at the first output terminal. The first voltage is the sum of the second voltage and the voltage consumed by the n clamping elements.

[0012] Among them, the first control branch includes a first switch, the second control branch includes a second switch, and at least one clamping control branch includes a first clamping control branch and a second clamping control branch. The first clamping control branch includes n clamping elements connected in series and a third switch, and the second clamping control branch includes m clamping elements connected in series and a fourth switch. Here, n and m are natural numbers respectively, n≥1, m≥1, and m is not equal to n. When the first switch, the second switch, the third switch, and the fourth switch are selected based on a mode selection signal to turn on the first control branch between the output terminal of the charge pump module and the input terminal of the modulation module, the charge pump circuit outputs a modulated second voltage at the second output terminal based on the turned-on first control branch, and outputs a first voltage matching the second voltage at the first output terminal. The first voltage and the second voltage are equal. When the first switch, the second switch, the third switch, and the fourth switch are selected based on a mode selection signal to turn on the second control branch and the first clamping control branch between the output terminal of the charge pump module and the input terminal of the modulation module, the charge pump circuit outputs a modulated second voltage at the second output terminal based on the turned-on second control branch and the first clamping control branch, and outputs a first voltage matching the second voltage at the first output terminal. The first voltage is the sum of the second voltage and the voltage consumed by the n clamping elements. When the first switch, the second switch, the third switch, and the fourth switch are selected based on a mode selection signal to turn on the second control branch and the second clamping control branch between the output terminal of the charge pump module and the input terminal of the modulation module, the charge pump circuit outputs a modulated second voltage at the second output terminal based on the turned-on second control branch and the second clamping control branch, and outputs a first voltage matching the second voltage at the first output terminal. The first voltage is the sum of the second voltage and the voltage consumed by the m clamping elements.

[0013] Among them, the modulation module also receives a reference voltage to perform feedback modulation in cooperation with the charge pump module based on the reference voltage, so as to stably modulate the sampling signal into a second voltage matching the reference voltage at the second output end, and enable the charge pump module to stably output a first voltage matching the second voltage at the first output end.

[0014] To solve the above problems, another technical solution adopted in this application is to provide a modulation method for a charge pump circuit, including: outputting a corresponding sampling signal to the modulation module according to a mode selection signal; performing feedback modulation using the modulation module and the charge pump module based on the sampling signal, so as to stably modulate the sampling signal into a second voltage for output at the second output end of the charge pump circuit, and stably output a first voltage matching the second voltage at the first output end of the charge pump circuit.

[0015] To solve the above problems, another technical solution adopted in this application is to provide a non-volatile memory chip, including the charge pump circuit provided in the above technical solution.

[0016] The beneficial effects of this application are as follows: Different from the prior art, a charge pump circuit provided in this application connects the charge pump module and the modulation module through a mode control module and receives a mode selection signal. The output end of the mode control module is connected to the input end of the modulation module and serves as the second output end of the charge pump circuit. By using the mode control module to output a corresponding sampling signal to the modulation module based on the output of the charge pump module and the mode selection signal, and through the feedback modulation of the modulation module and the charge pump module, the sampling signal is stably modulated into a second voltage for output at the second output end, and the charge pump module stably outputs a first voltage matching the second voltage at the first output end, so that the charge pump circuit can output two identical or different voltages, thereby reducing the number of charge pump circuits in the non-volatile memory chip, and thus reducing the power consumption and cost of the non-volatile memory chip. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

[0018] Figure 1 is a schematic structural diagram of an embodiment of the charge pump circuit provided in this application;

[0019] Figure 2 is a schematic structural diagram of an embodiment of the modulation module provided in this application;

[0020] Figure 3It is a schematic structural diagram of another embodiment of the charge pump circuit provided by this application;

[0021] Figure 4 It is a schematic diagram of an application scenario of the charge pump circuit provided by this application;

[0022] Figure 5 It is a schematic structural diagram of another embodiment of the charge pump circuit provided by this application;

[0023] Figure 6 It is a schematic diagram of another application scenario of the charge pump circuit provided by this application;

[0024] Figure 7 It is a schematic diagram of another application scenario of the charge pump circuit provided by this application;

[0025] Figure 8 It is a schematic diagram of another application scenario of the charge pump circuit provided by this application;

[0026] Figure 9 It is a schematic structural diagram of another embodiment of the charge pump circuit provided by this application;

[0027] Figure 10 It is a schematic diagram of another application scenario of the charge pump circuit provided by this application;

[0028] Figure 11 It is a schematic diagram of another application scenario of the charge pump circuit provided by this application;

[0029] Figure 12 It is a schematic structural diagram of another embodiment of the charge pump circuit provided by this application;

[0030] Figure 13 It is a schematic diagram of another application scenario of the charge pump circuit provided by this application;

[0031] Figure 14 It is a schematic diagram of another application scenario of the charge pump circuit provided by this application;

[0032] Figure 15 It is a schematic diagram of another application scenario of the charge pump circuit provided by this application;

[0033] Figure 16 It is a schematic flowchart of an embodiment of the modulation method of the charge pump circuit provided by this application;

[0034] Figure 17 It is a schematic structural diagram of an embodiment of the non-volatile memory chip provided by this application. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. In addition, it should be noted that for the sake of description, only the parts related to the present application rather than all the structures are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0036] The terms "first", "second", etc. in the present application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0037] Referring to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0038] Referring to Figure 1 , Figure 1 is a schematic structural diagram of an embodiment of a charge pump circuit provided by the present application. The charge pump circuit 100 includes a charge pump module 10, a modulation module 20, and a mode control module 30.

[0039] Among them, the output terminal of the charge pump module 10 serves as the first output terminal of the charge pump circuit 100. As Figure 1 shown, the first output terminal is used to output a first voltage V OUT1 .

[0040] In some embodiments, the charge pump module 10 may be formed by a Dickson negative voltage charge pump, or may be formed by a four-phase charge pump, or the charge pump module 10 may be a combination of a Dickson negative voltage charge pump and a four-phase charge pump.

[0041] The modulation module 20 is used to provide a feedback signal to the charge pump module 10 to modulate and stabilize the output of the charge pump module 10.

[0042] The mode control module 30 is connected to the charge pump module 10 and the modulation module 20, and receives the mode selection signal SEL. The output end of the mode control module 30 is connected to the input end of the modulation module 20 and serves as the second output end of the charge pump circuit 100. As Figure 1 shown, the second output end is used to output the second voltage V OUT2 .

[0043] Among them, based on the output of the charge pump module 10 and the mode selection signal SEL, the mode control module 30 outputs a corresponding sampling signal to the modulation module 20. After the feedback modulation of the modulation module 20 and the charge pump module 10, the sampling signal is modulated and stabilized as the second voltage V OUT2 for output at the second output end, and the charge pump module 10 stably outputs a first voltage V OUT2 matching the second voltage V OUT1 at the first output end.

[0044] Among them, the mode selection signal can be a low-level signal or a high-level signal to control the on or off of the internal switch of the mode control module 30, so that it outputs a corresponding sampling signal to the modulation module 20.

[0045] In some embodiments, the modulation module 20 can be a comparator. The inverting input end of the comparator is connected to the output end of the mode control module 30 (i.e., the second output end of the charge pump circuit 100), and the non-inverting input end of the comparator receives the reference voltage VREF to generate a feedback signal based on the reference voltage VREF and the sampling signal and input it to the charge pump module 10.

[0046] In some embodiments, referring to Figure 2 , the modulation module 20 can also include a voltage dividing circuit 21, a bandgap reference circuit 22, and a comparator 23. The second voltage V OUT2 (i.e., the sampling signal output by the mode control module 30 to the modulation module 20) is compared with the bandgap reference voltage as the reference voltage after passing through the voltage dividing circuit 21. When the second voltage V OUT2 is higher than the preset voltage, that is, the voltage output by the voltage dividing circuit 21 is greater than the bandgap reference voltage, the comparator 23 outputs a low-level feedback signal to the charge pump module 10, so that the output voltage V OUT1 of the charge pump module 10 stops rising, and then the second voltage V OUT2 (i.e., the sampling signal output by the mode control module 30 to the modulation module 20) follows the output voltage V OUT1 of the charge pump module 10 and also stops rising; conversely, when the second voltage V OUT2When the voltage is lower than the preset voltage, the comparator 23 outputs a feedback electrical signal of high level, turning on the clock circuit in the charge pump module 10, enabling the charge pump module 10 to work properly, and outputting a first voltage V OUT1 to rise. The second voltage V OUT2 (i.e., the sampling signal output by the mode control module 30 to the modulation module 20) follows the first output voltage V of the charge pump module 10 OUT1 to rise, so as to reach equilibrium, and make the second voltage V OUT2 output at the second output terminal of the charge pump circuit 100 equal to the preset voltage.

[0047] In this embodiment, the mode control module 30 is connected to the charge pump module 10 and the modulation module 20, and receives a mode selection signal SEL. The output terminal of the mode control module 30 is connected to the input terminal of the modulation module 20 and serves as the second output terminal of the charge pump circuit 100. Based on the output of the charge pump module 10 (the first voltage V OUT1 ) and the mode selection signal SEL, the mode control module 30 outputs a corresponding sampling signal to the modulation module 20. After the feedback modulation of the modulation module 20 and the charge pump module 10, the sampling signal is modulated and stabilized as the second voltage V OUT2 at the second output terminal for output, and the charge pump module needs to output a first voltage V OUT2 matching the second voltage V OUT1 stably at the first output terminal, so that the charge pump circuit 100 can output two identical or different voltages.

[0048] Therefore, when the charge pump circuit 100 of the present application is applied to a non-volatile memory chip, the number of charge pump circuits 100 in the non-volatile memory chip can be reduced, thereby reducing the power consumption and cost of the non-volatile memory chip. [[ID=2...]]

[0049] In other embodiments, the mode control module 30 includes multiple control branches (not shown in the figure), and each control branch is respectively connected between the output terminal of the charge pump module 10 and the input terminal of the modulation module 20. Among them, the mode control module 30 selects a corresponding control branch to conduct based on the received mode selection signal, so as to output a corresponding sampling signal to the modulation module 20. After the feedback modulation of the modulation module 20 and the charge pump module, the sampling signal is modulated and stabilized as the second voltage for output at the second output terminal, and the charge pump module 10 outputs a first voltage matching the second voltage at the first output terminal.

[0050] Specifically, in some embodiments, referring to [[ID=...]] Figure 3 , the charge pump circuit 100 includes a charge pump module 10, a modulation module 20, and a mode control module 30. The charge pump module 10 receives a clock signal CLK and an input voltage VIN.

[0051] Among them, the mode control module 30 includes a first control branch 31 and a second control branch 32, which are respectively connected between the output end of the charge pump module 10 and the input end of the modulation module 20.

[0052] Among them, the first control branch 31 includes n clamping elements connected in series, and the second control branch 32 includes a switching element SW to receive a mode selection signal SEL. Among them, n is a natural number, n≥1. The switching element SW can be a transistor, which can be turned on or off when receiving the mode selection signal SEL, such as a field effect transistor or a triode.

[0053] Among them, the clamping element can include electronic components such as diodes, which can consume a fixed voltage.

[0054] Among them, the charge pump module 10 also receives a clock signal CLK and an input voltage VIN.

[0055] Among them, the modulation module 20 also receives a reference voltage VREF, and performs feedback modulation in cooperation with the charge pump module 10 based on the reference voltage VREF, so as to modulate and stabilize the sampling signal into a second voltage V that matches the reference voltage VREF at the second output end OUT2 and make the charge pump module 10 stably output a first voltage V that matches the second voltage V at the first output end OUT2 at the first output end OUT1 .

[0056] In an application scenario, refer to Figure 3 , when the switching element SW is turned off based on the mode selection signal SEL, the first control branch 31 is turned on between the output end of the charge pump module 10 and the input end of the modulation module 20, and the charge pump circuit 100 outputs a modulated second voltage V at the second output end based on the turned-on first control branch 31 OUT2 and outputs a first voltage V that matches the second voltage V at the first output end OUT2 at the first output end OUT1 . Since the first control branch 31 includes n clamping elements connected in series, the clamping elements will consume part of the voltage, so the second voltage is less than the first voltage.

[0057] Among them, the first voltage V OUT1 is the sum of the second voltage V OUT2 and the voltage consumed by n clamping elements.

[0058] Specifically, the mode control module 30 is turned on based on the first control branch 31 to output a corresponding sampling signal to the modulation module 20, and the modulation module 20 receives the reference voltage VREF and generates a feedback signal FB based on the reference voltage VREF and the sampling signal. The charge pump module 10 performs modulation based on the feedback signal FB to modulate and stabilize the sampling signal into a second voltage V at the second output endOUT2 and output, and cause the charge pump module 10 to output a first voltage V that matches the second voltage V at the first output terminal OUT2 at the first output terminal OUT1 .

[0059] In this mode, the entire charge pump circuit 100 can provide a first voltage V and a second voltage V with different voltage values OUT1 and a second voltage V OUT2 to meet different voltage requirements.

[0060] In another application scenario, referring to Figure 4 , when the switching element SW is turned on based on the mode selection signal SEL, the second control branch 32 is turned on between the output terminal of the charge pump module 10 and the input terminal of the modulation module 20. The charge pump circuit 100 outputs a modulated second voltage V at the second output terminal based on the turned-on second control branch 32 OUT2 , and outputs a first voltage V that matches the second voltage V at the first output terminal OUT2 at the first output terminal OUT1 . Since the switching element SW is turned on, it is equivalent to short-circuiting the first control branch 31. The voltage consumption of the switching element SW can be ignored, so the first voltage V OUT1 and the second voltage V OUT2 are the same. The charge pump module 10 receives the clock signal CLK and the input voltage VIN.

[0061] Specifically, the mode control module 30 turns on based on the second control branch 32 to output a corresponding sampling signal to the modulation module 20, and the modulation module 20 receives the reference voltage VREF to generate a feedback signal FB based on the reference voltage VREF and the sampling signal. The charge pump module 10 modulates based on the feedback signal FB to stably modulate the sampling signal into a second voltage V OUT2 and output, and cause the charge pump module 10 to output a first voltage V that matches the second voltage V at the first output terminal OUT2 at the first output terminal OUT1 .

[0062] In this mode, the entire charge pump circuit 100 can provide two identical first voltages V OUT1 and a second voltage V OUT2 to meet two identical voltage requirements.

[0063] In some embodiments, referring to Figure 5 , the charge pump circuit 100 includes a charge pump module 10, a modulation module 20, and a mode control module 30. The charge pump module 10 receives the clock signal CLK and the input voltage VIN.

[0064] Among them, the mode control module 30 includes a first control branch 31, a second control branch 32, and a third control branch 33, which are respectively connected between the output end of the charge pump module 10 and the input end of the modulation module 20.

[0065] Among them, the first control branch 31 includes n clamping elements connected in series and a first switch SW1.

[0066] The second control branch 32 includes m clamping elements connected in series and a second switch SW2. Among them, n and m are natural numbers respectively, n≥1, m≥1, and m is not equal to n.

[0067] The third control branch 33 includes a third switch SW3.

[0068] In an application scenario, refer to Figure 6 , when the first switch SW1, the second switch SW2, and the third switch SW3 select the first control branch 31 to conduct between the output end of the charge pump module 10 and the input end of the modulation module 20 based on the mode selection signal SEL, the charge pump circuit 100 outputs a modulated second voltage V OUT2 at the second output end based on the conducted first control branch 31, and outputs a first voltage V OUT2 matching the second voltage V OUT1 at the first output end. The charge pump module 10 receives the clock signal CLK and the input voltage VIN.

[0069] In this case, the first switch SW1 is conducted, the second switch SW2 is disconnected, and the third switch SW3 is disconnected. Since the first control branch 31 includes n clamping elements connected in series, the clamping elements will consume part of the voltage, so the second voltage V OUT2 is less than the first voltage V OUT1 .

[0070] Among them, the first voltage V OUT1 is the sum of the second voltage V OUT2 and the voltage consumed by n clamping elements.

[0071] Specifically, the mode control module 30 conducts based on the first control branch 31 to output a corresponding sampling signal to the modulation module 20, and the modulation module 20 receives the reference voltage VREF to generate a feedback signal FB based on the reference voltage VREF and the sampling signal. The charge pump module 10 modulates based on the feedback signal FB to stably modulate the sampling signal into the second voltage V OUT2 for output at the second output end, and makes the charge pump module 10 output a first voltage V OUT2 matching the second voltage V OUT1 at the first output end, where V OUT1 = V OUT2 + n * V d, V d The fixed voltage consumed by each clamping element.

[0072] In this mode, the entire charge pump circuit 100 can provide a first voltage V with different voltage values OUT1 and a second voltage V OUT2 , to meet different voltage requirements.

[0073] In another application scenario, refer to Figure 7 , when the first switch SW1, the second switch SW2, and the third switch SW3 select the second control branch 32 to conduct based on the mode selection signal SEL between the output end of the charge pump module 10 and the input end of the modulation module 20, the charge pump circuit 100 outputs a modulated second voltage V at the second output end based on the conducted second control branch 32 OUT2 , and outputs a first voltage V that matches the second voltage V at the first output end OUT2 . OUT1 .

[0074] In this case, the first switch SW1 is turned off, the second switch SW2 is turned on, and the third switch SW3 is turned off. Since the second control branch 32 includes m clamping elements connected in series, the clamping elements will consume part of the voltage, so the second voltage V OUT2 is less than the first voltage V OUT1 .

[0075] Among them, the first voltage V OUT1 is the sum of the second voltage V OUT2 and the voltage consumed by m clamping elements.

[0076] Specifically, the mode control module 30 conducts based on the second control branch 32 to output a corresponding sampling signal to the modulation module 20, and the modulation module 20 receives the reference voltage VREF to generate a feedback signal FB based on the reference voltage VREF and the sampling signal. The charge pump module 10 modulates based on the feedback signal FB to stably modulate the sampling signal into the second voltage V OUT2 for output at the second output end, and makes the charge pump module 10 output a first voltage V that matches the second voltage V OUT2 at the first output end, where, V OUT1 , where V OUT1 =V OUT2 +m*V d , V d is the fixed voltage consumed by each clamping element. The charge pump module 10 receives the clock signal CLK and the input voltage VIN.

[0077] In this mode, the entire charge pump circuit 100 can provide a first voltage V with another different voltage value OUT1 and a second voltage V OUT2, to meet different voltage requirements.

[0078] In another application scenario, refer to Figure 8 , when the first switch SW1, the second switch SW2, and the third switch SW3 select the third control branch 33 to conduct based on the mode selection signal SEL between the output end of the charge pump module 10 and the input end of the modulation module 20, the charge pump circuit outputs the modulated second voltage V at the second output end based on the conducted third control branch OUT2 , and outputs the first voltage V that matches the second voltage V at the first output end OUT2 of OUT1 , where the first voltage V OUT1 and the second voltage V OUT2 are equal.

[0079] In this case, the first switch SW1 is turned off, the second switch SW2 is turned off, and the third switch SW3 is turned on. Since the third switch SW3 is turned on, it is equivalent to short - circuiting the first control branch 31 and the second control branch 32. The voltage consumption of the third switch SW3 can be ignored, so the first voltage V OUT1 and the second voltage V OUT2 are the same.

[0080] Specifically, the mode control module 30 conducts based on the third control branch 33 to output a corresponding sampling signal to the modulation module 20, and the modulation module 20 receives the reference voltage VREF to generate a feedback signal FB based on the reference voltage VREF and the sampling signal. The charge pump module 10 modulates based on the feedback signal FB to stably modulate the sampling signal into the second voltage V at the second output end OUT2 for output, and enables the charge pump module 10 to output the first voltage V that matches the second voltage V at the first output end OUT2 of OUT1 . The charge pump module 10 receives the clock signal CLK and the input voltage VIN.

[0081] In this mode, the entire charge pump circuit 100 can provide two identical voltages to meet two identical voltage requirements.

[0082] In some embodiments, refer to Figure 9 , the charge pump circuit 100 includes a charge pump module 10, a modulation module 20, and a mode control module 30. Among them, the charge pump module 10 includes a cascaded first charge pump unit 11 and a second charge pump unit 12.

[0083] Among them, the output end of the second charge pump unit 12 serves as the output end and the first output end of the charge pump module 10, and the node A between the first charge pump unit 11 and the second charge pump unit 12 serves as the intermediate output end of the charge pump module 10.

[0084] Among them, the mode control module 30 includes a first control branch 31, a second control branch 32, and at least one clamping control branch 34. The first control branch 31 is connected between the output end of the charge pump module 10 and the input end of the modulation module 20. The second control branch 32 is connected between the intermediate output end of the charge pump module 10 and the input end of the modulation module 20. At least one clamping control branch 34 is connected between the first control branch 31 and the second control branch 32.

[0085] Among them, the modulation module 20 also receives a reference voltage VREF to perform feedback modulation in cooperation with the charge pump module 10 based on the reference voltage VREF, so as to modulate and stabilize the sampling signal into a second voltage V that matches the reference voltage at the second output end OUT2 and enables the charge pump module 10 to stably output a first voltage V that matches the second voltage V at the first output end OUT2 at the first output end. OUT1 .

[0086] In an application scenario, the mode control module 30 selects the first control branch 31 to conduct based on the received mode selection signal SEL, so as to output a corresponding sampling signal to the modulation module 20. After the feedback modulation of the modulation module 20 and the charge pump module 10, the sampling signal is modulated and stabilized into a second voltage V at the second output end OUT2 for output, and enables the charge pump module 10 to output a first voltage V that matches the second voltage V at the first output end OUT2 at the first output end. OUT1 .

[0087] In another application scenario, the mode control module 30 selects a corresponding clamping control branch 34 among the second control branch 32 and at least one clamping control branch 34 to conduct based on the received mode selection signal SEL, so as to output a corresponding sampling signal to the modulation module 20. After the feedback modulation of the modulation module 20 and the charge pump module 10, the sampling signal is modulated and stabilized into a second voltage V at the second output end OUT2 for output, and enables the charge pump module 10 to output a first voltage V that matches the second voltage V at the first output end OUT2 at the first output end. OUT1 .

[0088] Specifically, as Figure 9 shown, the first control branch 31 includes a first switch SW1, and the second control branch 32 includes a second switch SW2. In this embodiment, at least one clamping control branch 34 is a clamping control branch 34, which includes n clamping elements connected in series and a third switch SW3. Among them, n is a natural number and n≥1. The charge pump module 10 receives a clock signal CLK and an input voltage VIN.

[0089] In an application scenario, referring to Figure 10, when the first switch SW1, the second switch SW2, and the third switch SW3 select the first control branch 31 to conduct based on the mode selection signal SEL between the output terminal of the charge pump module 10 and the input terminal of the modulation module 20, the charge pump circuit 100 outputs a modulated second voltage V at the second output terminal based on the conducted first control branch 31 OUT2 , and outputs a first voltage V that matches the second voltage V at the first output terminal OUT2 . OUT1 .

[0090] In this case, the first switch SW1 is conducting, the second switch SW2 is off, and the third switch SW3 is off. Since the first switch SW1 is conducting, it is equivalent to short - circuiting the second control branch 32 and at least one clamping control branch. The voltage consumption of the first switch SW1 can be ignored, so the first voltage V OUT1 and the second voltage V OUT2 are the same.

[0091] Specifically, the mode control module 30 outputs a corresponding sampling signal to the modulation module 20 based on the conduction of the first control branch 31, and the modulation module 20 receives the reference voltage VREF to generate a feedback signal FB based on the reference voltage VREF and the sampling signal. The charge pump module 10 modulates based on the feedback signal FB to stably modulate the sampling signal into the second voltage V OUT2 at the second output terminal for output, and enables the charge pump module 10 to output a first voltage V that matches the second voltage V OUT2 at the first output terminal. OUT1 The charge pump module 10 receives the clock signal CLK and the input voltage VIN.

[0092] In this mode, the entire charge pump circuit 100 can provide two identical voltages to meet two identical voltage requirements.

[0093] In another application scenario, referring to Figure 11 , when the first switch SW1, the second switch SW2, and the third switch SW3 select the second control branch 32 and the clamping control branch 34 to conduct based on the mode selection signal SEL between the output terminal of the charge pump module 10 and the input terminal of the modulation module 20, the charge pump circuit 100 outputs a modulated second voltage V at the second output terminal based on the conducted second control branch 32 and the clamping control branch 34 OUT2 , and outputs a first voltage V that matches the second voltage V at the first output terminal OUT2 . OUT1 .

[0094] In this case, the first switch SW1 is off, the second switch SW2 is conducting, and the third switch SW3 is conducting. At this time, the second voltage is equal to the voltage of node A and the voltage of node B, so the first voltage VOUT1 is the second voltage V OUT2 and the sum of the voltages consumed by n clamping elements.

[0095] Specifically, the mode control module 30 is turned on based on the second control branch 32 and the clamping control branch 34 to output a corresponding sampling signal to the modulation module 20, and the modulation module 20 receives the reference voltage VREF to generate a feedback signal FB based on the reference voltage VREF and the sampling signal. The charge pump module 10 modulates based on the feedback signal FB to stably modulate the sampling signal to the second voltage V OUT2 at the second output terminal and output, and makes the charge pump module 10 output a first voltage V OUT2 matching the second voltage V OUT1 at the first output terminal. The charge pump module 10 receives the clock signal CLK and the input voltage VIN.

[0096] In this mode, the entire charge pump circuit 100 can provide the first voltage V with different voltage values OUT1 and the second voltage V OUT2 to meet different voltage requirements.

[0097] In some embodiments, referring to Figure 12 , the charge pump circuit 100 includes a charge pump module 10, a modulation module 20, and a mode control module 30. Among them, the charge pump module 10 includes a cascaded first charge pump unit 11 and a second charge pump unit 12. The specific connection relationship can refer to any of the above embodiments. The charge pump module 10 receives the clock signal CLK and the input voltage VIN.

[0098] Among them, the first control branch 31 includes a first switch SW1, the second control branch 32 includes a second switch SW2. In this embodiment, at least one clamping control branch 34 includes a first clamping control branch 341 and a second clamping control branch 342. The first clamping control branch 341 includes n clamping elements connected in series and a third switch SW3, and the second clamping control branch 342 includes m clamping elements connected in series and a fourth switch SW4. Among them, n and m are natural numbers respectively, n≥1, m≥1, and m is not equal to n.

[0099] In an application scenario, referring to Figure 13 , when the first switch SW1, the second switch SW2, the third switch SW3, and the fourth switch SW4 are selected based on the mode selection signal SEL to turn on the first control branch 31 between the output terminal of the charge pump module 10 and the input terminal of the modulation module 20, the charge pump circuit outputs the modulated second voltage V OUT2 at the second output terminal based on the turned-on first control branch 31 and outputs a first voltage V OUT2 matching the second voltage V OUT1, the first voltage V OUT1 and the second voltage V OUT2 are equal.

[0100] In this case, the first switch SW1 is turned on, the second switch SW2 is turned off, the third switch SW3 is turned off, and the fourth switch SW4 is turned off. Since the first switch SW1 is turned on, it is equivalent to short-circuiting the second control branch 32 and at least one clamping control branch 34. The voltage consumption of the first switch SW1 can be ignored, so the first voltage V OUT1 and the second voltage V OUT2 are the same.

[0101] Specifically, the mode control module 30 turns on based on the second control branch 32 and the first clamping control branch 341 to output a corresponding sampling signal to the modulation module 20, and the modulation module 20 receives the reference voltage VREF to generate a feedback signal FB based on the reference voltage VREF and the sampling signal. The charge pump module 10 modulates based on the feedback signal FB to stably modulate the sampling signal into the second voltage V OUT2 at the second output terminal and output, and makes the charge pump module 10 output a first voltage V OUT2 matching the second voltage V OUT1 at the first output terminal. The charge pump module 10 receives the clock signal CLK and the input voltage VIN.

[0102] In this mode, the entire charge pump circuit 100 can provide the first voltage V OUT1 and the second voltage V OUT2 with the same voltage value to meet the same voltage requirements.

[0103] In an application scenario, referring to Figure 14 , when the first switch SW1, the second switch SW2, the third switch SW3, and the fourth switch SW4 are selected based on the mode selection signal SEL to turn on the second control branch 32 and the first clamping control branch 341 between the output terminal of the charge pump module 10 and the input terminal of the modulation module 20, the charge pump circuit 100 outputs the modulated second voltage V OUT2 at the second output terminal based on the turned-on second control branch 32 and the first clamping control branch 341, and outputs a first voltage V OUT2 matching the second voltage V OUT1 at the first output terminal. The first voltage V OUT1 is the sum of the second voltage V OUT2 and the voltage consumed by n clamping elements.

[0104] In this case, the first switch SW1 is turned off, the second switch SW2 is turned on, the third switch SW3 is turned on, and the fourth switch SW4 is turned off. Since the second switch SW2 is turned on, it is equivalent to short-circuiting the first control branch 31 and at least one clamping control branch 34, and the voltage at node A is the same as the second voltage V OUT2 is the same. And the first voltage V OUT1 is the sum of the second voltage V OUT2 and the voltages consumed by n clamping elements.

[0105] Specifically, the mode control module 30 turns on the second control branch 32 and the first clamping control branch 341 to output a corresponding sampling signal to the modulation module 20, and the modulation module 20 receives the reference voltage VREF to generate a feedback signal FB based on the reference voltage VREF and the sampling signal. The charge pump module 10 modulates based on the feedback signal FB to stably modulate the sampling signal into the second voltage V OUT2 at the second output terminal and output it, and make the charge pump module 10 output the first voltage V OUT2 matching the second voltage V OUT1 at the first output terminal. The charge pump module 10 receives the clock signal CLK and the input voltage VIN.

[0106] In this mode, the entire charge pump circuit 100 can provide the first voltage V OUT1 and the second voltage V OUT2 with different voltage values to meet different voltage requirements.

[0107] In an application scenario, referring to Figure 15 , when the first switch SW1, the second switch SW2, the third switch SW3, and the fourth switch SW4 select the second control branch 32 and the second clamping control branch 342 to conduct between the output terminal of the charge pump module 10 and the input terminal of the modulation module 20 based on the mode selection signal SEL, the charge pump circuit 100 outputs the modulated second voltage V OUT2 at the second output terminal based on the conducting second control branch 32 and the second clamping control branch 342, and outputs the first voltage V OUT2 matching the second voltage V OUT1 at the first output terminal. The first voltage V OUT1 is the sum of the second voltage V OUT2 and the voltages consumed by m clamping elements.

[0108] In this case, the first switch SW1 is turned off, the second switch SW2 is turned on, the third switch SW3 is turned off, and the fourth switch SW4 is turned on. Since the second switch SW2 is turned on, it is equivalent to short-circuiting the first control branch 31 and at least one clamping control branch 34, and the voltage at node A is the same as the second voltage V OUT2 is the same. And the first voltage VOUT1 is the second voltage V OUT2 and the sum of the voltages consumed by m clamping elements.

[0109] Specifically, the mode control module 30 is turned on based on the second control branch 32 and the second clamping control branch 342 to output a corresponding sampling signal to the modulation module 20, and the modulation module 20 receives the reference voltage VREF to generate a feedback signal FB based on the reference voltage VREF and the sampling signal. The charge pump module 10 is modulated based on the feedback signal FB to stably modulate the sampling signal to the second voltage V OUT2 at the second output end and output it, and cause the charge pump module 10 to output a first voltage V OUT2 matching the second voltage V OUT1 at the first output end. The charge pump module 10 receives the clock signal CLK and the input voltage VIN.

[0110] In this mode, the entire charge pump circuit 100 can provide a first voltage V[[ID=1 ']] OUT1 and a second voltage V OUT2 with different voltage values to meet different voltage requirements.

[0111] Refer to Figure 16 , Figure 16 which is a schematic flowchart of an embodiment of the modulation method of the charge pump circuit provided in this application. The method includes:

[0112] [[ID='29']]Step 161: Output a corresponding sampling signal to the modulation module 20 according to the mode selection signal SEL;

[0113] Step 162: Perform feedback modulation using the modulation module 20 and the charge pump module 10 based on the sampling signal to stably modulate the sampling signal to the second voltage for output at the second output end of the charge pump circuit, and stably output a first voltage matching the second voltage at the first output end of the charge pump circuit.

[0114] The method provided in this embodiment can be implemented based on the charge pump circuit 100 in any of the above embodiments. For specific reference, please refer to any of the above embodiments, which will not be elaborated here.

[0115] In this embodiment, the charge pump circuit can output two identical or different voltages. When the charge pump circuit is applied to a non-volatile memory chip, the number of charge pump circuits in the non-volatile memory chip can be reduced, thereby reducing the power consumption and cost of the non-volatile memory chip. [[ID='39']]

[0116] Refer to Figure 17 , Figure 17 which is a schematic structural diagram of an embodiment of the non-volatile memory chip provided in this application. The non-volatile memory chip 200 includes a charge pump circuit 100.

[0117] The external controller sends relevant instructions to the non-volatile memory chip 200 to complete the writing or reading of data. When the non-volatile memory chip 200 performs data reading and writing, it needs to apply a high-voltage bias to the memory cells to complete this process, and usually requires multiple high voltages, which are mainly reflected in several aspects: 1) Different high voltages are required in different operation modes; 2) In one operation mode, multiple high voltages may also be required; 3) To bias the operation high voltage to the memory cells, an additional high voltage is required for transmission.

[0118] Based on this, by means of a charge pump circuit 100 that can provide two identical voltages or different voltages to meet the reading or writing requirements of the non-volatile memory chip 200, the number of charge pump circuits 100 in the non-volatile memory chip 200 can be reduced, thereby reducing power consumption, and further reducing the area of the non-volatile memory chip 200.

[0119] In several embodiments provided in the present application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0120] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place, or they can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0121] In addition, each functional unit in various embodiments of the present application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0122] If the integrated units in the above-mentioned other embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs.

[0123] The above description is only for the embodiments of this application, and does not limit the patent scope of this application. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of this application.

Claims

1. A charge pump circuit, characterized in that, Comprising: A charge pump module, wherein the output terminal of the charge pump module serves as the first output terminal of the charge pump circuit; A modulation module for providing a feedback signal to the charge pump module to modulate and stabilize the output of the charge pump module; A mode control module connected to the charge pump module and the modulation module and receiving a mode selection signal, the output terminal of the mode control module being connected to the input terminal of the modulation module and serving as the second output terminal of the charge pump circuit; Wherein, based on the output of the charge pump module and the mode selection signal, the mode control module outputs a corresponding sampling signal to the modulation module, and through the feedback modulation of the modulation module and the charge pump module, the sampling signal is modulated and stabilized to a second voltage at the second output terminal for output, and the charge pump module stably outputs a first voltage matching the second voltage at the first output terminal; The charge pump module includes a cascaded first charge pump unit and a second charge pump unit, wherein the output terminal of the second charge pump unit serves as the output terminal and the first output terminal of the charge pump module, and the node between the first charge pump unit and the second charge pump unit serves as the intermediate output terminal of the charge pump module; The mode control module includes a first control branch, a second control branch and at least one clamping control branch, the first control branch being connected between the output terminal of the charge pump module and the input terminal of the modulation module; the second control branch being connected between the intermediate output terminal of the charge pump module and the input terminal of the modulation module; the at least one clamping control branch being connected between the first control branch and the second control branch; Wherein, based on the received mode selection signal, the mode control module selects the first control branch to conduct, or the second control branch and one of the clamping control branches to conduct, so as to output the corresponding sampling signal to the modulation module, and through the feedback modulation of the modulation module and the charge pump module, the sampling signal is modulated and stabilized to the second voltage at the second output terminal for output, and the charge pump module outputs the first voltage matching the second voltage at the first output terminal.

2. The charge pump circuit according to claim 1, wherein The first control branch includes a first switch, the second control branch includes a second switch, the at least one clamping control branch includes a first clamping control branch, and the first clamping control branch includes n clamping elements connected in series and a third switch; wherein n is a natural number and n≥1; When the first switch, the second switch and the third switch select the first control branch to conduct between the output terminal of the charge pump module and the input terminal of the modulation module based on the mode selection signal, the charge pump circuit outputs the modulated second voltage at the second output terminal based on the conducted first control branch, and outputs the first voltage matching the second voltage at the first output terminal, and the first voltage and the second voltage are equal; When the first switch, the second switch, and the third switch select the second control branch and the first clamping control branch to conduct between the output end of the charge pump module and the input end of the modulation module based on the mode selection signal, the charge pump circuit outputs the modulated second voltage at the second output end based on the conducted second control branch and the first clamping control branch, and outputs the first voltage matching the second voltage at the first output end. The first voltage is the sum of the second voltage and the voltages consumed by n clamping elements.

3. The charge pump circuit according to claim 1, wherein the first control branch includes a first switch, the second control branch includes a second switch, the at least one clamping control branch includes a first clamping control branch and a second clamping control branch. The first clamping control branch includes n clamping elements and a third switch connected in series, and the second clamping control branch includes m clamping elements and a fourth switch connected in series; where n and m are natural numbers respectively, n≥1, m≥1, and m is not equal to n; when the first switch, the second switch, the third switch, and the fourth switch select the first control branch to conduct between the output end of the charge pump module and the input end of the modulation module based on the mode selection signal, the charge pump circuit outputs the modulated second voltage at the second output end based on the conducted first control branch, and outputs the first voltage matching the second voltage at the first output end. The first voltage and the second voltage are equal; when the first switch, the second switch, the third switch, and the fourth switch select the second control branch and the first clamping control branch to conduct between the output end of the charge pump module and the input end of the modulation module based on the mode selection signal, the charge pump circuit outputs the modulated second voltage at the second output end based on the conducted second control branch and the first clamping control branch, and outputs the first voltage matching the second voltage at the first output end. The first voltage is the sum of the second voltage and the voltages consumed by n clamping elements; when the first switch, the second switch, the third switch, and the fourth switch select the second control branch and the second clamping control branch to conduct between the output end of the charge pump module and the input end of the modulation module based on the mode selection signal, the charge pump circuit outputs the modulated second voltage at the second output end based on the conducted second control branch and the second clamping control branch, and outputs the first voltage matching the second voltage at the first output end. The first voltage is the sum of the second voltage and the voltages consumed by m clamping elements.

4. The charge pump circuit according to claim 1, wherein The modulation module also receives a reference voltage to perform feedback modulation in cooperation with the charge pump module based on the reference voltage, so as to stably modulate the sampling signal into the second voltage matching the reference voltage at the second output end, and enable the charge pump module to stably output the first voltage matching the second voltage at the first output end.

5. A modulation method for a charge pump circuit, characterized in that, Applied to the charge pump circuit according to any one of claims 1-4, the modulation method includes: Output a corresponding sampling signal to the modulation module according to the mode selection signal; Based on the sampling signal, perform feedback modulation by using the modulation module and the charge pump module, so as to stably modulate the sampling signal into a second voltage for output at the second output end of the charge pump circuit, and stably output the first voltage matching the second voltage at the first output end of the charge pump circuit.

6. A non-volatile memory chip, characterized in that, Comprising the charge pump circuit according to any one of claims 1-5.

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