Golden finger power supply control circuit and device

Abstract

The utility model relates to the technical field of electronics, and discloses a golden finger power supply control circuit and device, and the golden finger power supply control circuit comprises a voltage comparison module, a logic gate circuit module, a control module, a hard switch module and an electronic switch module. The voltage comparison module is used for comparing the output voltage of the power supply module with the own system voltage to obtain a first-stage enable signal; the logic gate circuit module is used for performing logic operation on the first-stage enable signal output by the voltage comparison module and the soft switching signal output by the control module to obtain a second-stage enable signal; the logic gate circuit module is also used for performing logic operation on the second-stage enable signal and a hard switch signal output by the hard switch module to obtain a third-stage enable signal; and the electronic switch module is used for outputting voltage to the golden finger plate by the power supply module for power supply when receiving the third-stage enable signal, so that the safety in the process of manually plugging and unplugging the golden finger plate and the stability of the equipment are improved.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and in particular, to a gold finger power control circuit and device. Background Art

[0002] The gold finger daughter board, as an indispensable core component for connection and transmission in the field of electronic technology, plays a crucial role in promoting the efficient exchange of signals and power between circuit boards, modules, and systems. However, with the increasing complexity of the electronic technology field, the use of gold finger daughter boards also faces a series of challenges. The applicant found that as Figure 1 shown, traditional circuit designs often rely on software to control electronic switches, or require manual pressing of push-button switches to turn off the power, and sometimes may not even have any switches set. When allowing hot plugging of the gold finger daughter board, due to the lack of sufficient protection mechanisms, it is easy to cause damage to the gold finger board and even may lead to serious problems such as circuit short circuits.

[0003] Therefore, how to improve the safety and stability of the gold finger daughter board and reduce damage and failures caused by design defects or improper operations has become an urgent problem to be solved. Summary of the Utility Model

[0004] In view of this, the embodiments of this application provide a gold finger power control circuit and device, which can effectively solve problems such as easy damage and short circuit of the gold finger board caused by the lack of sufficient protection mechanisms during the hot plugging of the gold finger board.

[0005] In a first aspect, the embodiments of this application provide a gold finger power control circuit, including: a voltage comparison module, a logic gate circuit module, a control module, a hard switch module, and an electronic switch module;

[0006] The voltage comparison module is used to compare the voltage to be output by the power supply module with the system voltage of itself to obtain a first-level enable signal;

[0007] The logic gate circuit module is used to perform a logical operation on the first-level enable signal output by the voltage comparison module and the soft switch signal output by the control module to obtain a second-level enable signal;

[0008] The logic gate circuit module is further used to perform a logical operation on the second-level enable signal and the hard switch signal output by the hard switch module to obtain a third-level enable signal;

[0009] The electronic switch module is used to supply the output voltage of the power supply module to the gold finger board for power supply when receiving the third-level enable signal.

[0010] In some embodiments, the voltage comparison module includes a comparator; the inverting input terminal of the comparator is used to connect to the output voltage of the power supply module, the non-inverting input terminal of the comparator is used to connect to the self-system voltage of the power supply module, and the output terminal of the comparator is connected to the logic gate circuit module;

[0011] Wherein, when the self-system voltage of the power supply module exceeds the voltage to be output, a first-stage enable signal with a high level is output.

[0012] In some embodiments, the logic gate circuit module includes a first logic gate unit and a second logic gate unit;

[0013] The first input terminal of the first logic gate unit is connected to the output terminal of the comparator, the second input terminal of the first logic gate unit is connected to the output terminal of the control module, and the output terminal of the first logic gate unit is connected to the first input terminal of the second logic gate unit;

[0014] The first input terminal of the second logic gate unit is connected to the output terminal of the first logic gate unit, the second input terminal of the second logic gate unit is connected to the output terminal of the hard switch module, and the output terminal of the second logic gate unit is connected to the first input terminal of the electronic switch;

[0015] The first input terminal of the first logic gate unit is used to receive the first-stage enable signal, and the second input terminal of the first logic gate unit receives the soft switch signal. Wherein, when both the first-stage enable signal and the soft switch signal are at a high level, the output terminal of the first logic gate unit outputs a second-stage enable signal with a high level;

[0016] The first input terminal of the second logic gate unit is used to receive the second-stage enable signal, and the second input terminal of the second logic gate unit is used to receive the hard switch signal. Wherein, when both the second-stage enable signal and the hard switch signal are at a high level, the output terminal of the second logic gate unit outputs a third-stage enable signal with a high level.

[0017] In some embodiments, the control module includes a microcontroller, and the output terminal of the microcontroller is connected to the second input terminal of the first logic gate unit;

[0018] When both the soft switch signal output by the microcontroller and the first-stage enable signal are at a high level, the output terminal of the first logic gate unit outputs the second-stage enable signal.

[0019] In some embodiments, the microcontroller is any one of FPGA, CPLD, and MCU.

[0020] In some embodiments, the hard switch module includes a hard switch having a switch rebound stroke, and the hard switch is disposed under the gold finger board;

[0021] When the gold finger board presses down the hard switch, the hard switch module outputs a high-level signal. When the gold finger board does not press down the hard switch, the hard switch module outputs a low-level signal.

[0022] In some embodiments, the electronic switch module includes at least one electronic switch;

[0023] The controlled end of the electronic switch is connected to the output end of the second logic gate unit, the signal input end of the electronic switch is connected to the voltage output end of the power supply module, and the signal output end of the electronic switch is connected to the power input end of the gold finger board;

[0024] The electronic switch is configured to conduct when receiving the valid third-level enable signal, so that the power supply module outputs voltage to the gold finger board for power supply.

[0025] In some embodiments, the electronic switch is any one of a MOSFET transistor and a load switch transistor.

[0026] In a second aspect, an embodiment of the present application provides a gold finger power control device, including at least one gold finger power control circuit described in the first aspect above, wherein the number of the gold finger power control circuits is equal to the number of power supply modules required by the gold finger board.

[0027] In some embodiments, a plurality of the gold finger power control circuits share one hard switch module.

[0028] The embodiments of the present application have the following beneficial effects: The gold finger power control circuit and device of the present application include: a voltage comparison module, a logic gate circuit module, a control module, a hard switch module, and an electronic switch module; wherein, the voltage comparison module is used to compare the output voltage of the power supply module with its own system voltage to obtain a first-level enable signal; the logic gate circuit module is used to perform a logical operation on the first-level enable signal output by the voltage comparison module and the soft switch signal output by the control module to obtain a second-level enable signal; the logic gate circuit module is further used to perform a logical operation on the second-level enable signal and the hard switch signal output by the hard switch module to obtain a third-level enable signal; the electronic switch module is used to, when receiving the third-level enable signal, output the voltage of the power supply module to the gold finger board for power supply. By successively receiving three levels of enable signals, when receiving the third-level enable signal, this signal acts on the electronic switch, and then the output voltage of the power supply module is input to the gold finger board through the electronic switch for power supply, avoiding the phenomenon of daughter board damage caused by unstable power supply or operation errors during the process of manually plugging and unplugging the gold finger board, thereby improving the safety of operation and the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0030] Figure 1 FIG. shows the structural schematic diagram of the conventional gold finger circuit of the embodiment of the present application;

[0031] Figure 2 FIG. shows the first structural schematic diagram of the gold finger power control circuit of the embodiment of the present application;

[0032] Figure 3 FIG. shows the second structural schematic diagram of the gold finger power control circuit of the embodiment of the present application;

[0033] Figure 4 FIG. shows the third structural schematic diagram of the gold finger power control circuit of the embodiment of the present application;

[0034] Figure 5 FIG. shows the fourth structural schematic diagram of the gold finger power control circuit of the embodiment of the present application;

[0035] Figure 6 FIG. shows the fifth structural schematic diagram of the gold finger power control circuit of the embodiment of the present application;

[0036] Figure 7It shows a schematic structural diagram of two control circuits in the gold finger power control circuit according to an embodiment of the present application;

[0037] Figure 8 It shows a schematic structural diagram of another two control circuits in the gold finger power control circuit according to an embodiment of the present application;

[0038] Figure 9 It shows a schematic diagram of the gold finger power control device according to an embodiment of the present application.

[0039] Main element symbol description: 100: voltage comparison module; 101: comparator; 110: logic gate circuit module; 111: first logic gate unit; 112: second logic gate unit; 113: first AND gate; 114: second AND gate; 130: control module; 131: microcontroller; 140: hard switch module; 141: hard switch; 150: electronic switch module; 151: electronic switch; 160: power supply module; 170: gold finger board; 190: first voltage comparison module; 200: first logic gate circuit module; 210: first control module; 220: first electronic switch module; 230: first power supply module; 240: second voltage comparison module; 250: second logic gate circuit module; 260: second control module; 270: second electronic switch module; 280: second power supply module; 10: gold finger power control circuit; 290: system voltage of path A; 300: comparator A; 310: software switch A; 320: AND gate A; 330: AND gate B; 340: electronic switch A; 350: operating voltage of path A; 360: hardware automatic switch; 370: system voltage of path B; 380: comparator B; 390: software switch B; 400: AND gate C; 410: AND gate D; 420: electronic switch B; 430: operating voltage of path B; 440: gold finger daughter board. Detailed implementation manners

[0040] 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. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0041] Generally, the components of the embodiments of the present application described and illustrated herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0042] In the following, the terms "comprising", "having" and their cognates that can be used in various embodiments of the present application are only intended to represent specific features, numbers, steps, operations, elements, components or combinations of the foregoing items, and should not be construed as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing items or precluding the possibility of adding one or more features, numbers, steps, operations, elements, components or combinations of the foregoing items. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0043] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the various embodiments of the present application pertain. The terms (such as those defined in a commonly used dictionary) will be construed to have the same meaning as the contextual meaning in the relevant technical field and will not be construed to have an idealized meaning or an overly formal meaning unless clearly defined in the various embodiments of the present application.

[0044] In view of the fact that traditional circuit designs often lack sufficient protection mechanisms when allowing hot plugging of the gold finger board, which may lead to easy damage of the gold finger board and even serious problems such as circuit short - circuit, the present application proposes a gold finger power control circuit and device. The gold finger power control circuit and device of the present application receive three levels of enable signals in sequence. When the third - level enable signal is received, this signal is applied to an electronic switch, and then the output voltage of the power supply module is input to the gold finger board through the electronic switch for power supply, thus avoiding the phenomenon of daughter - board damage caused by unstable power supply or operational errors during the process of manually plugging and unplugging the gold finger board, thereby improving the safety of operation and the stability of the device.

[0045] The following will illustrate the gold finger power control circuit in conjunction with some specific embodiments.

[0046] In one embodiment, Figure 2A structural schematic diagram of a gold finger power control circuit according to an embodiment of the present application is shown. The gold finger power control circuit 10 includes: a voltage comparison module 100, a logic gate circuit module 110, a control module 130, a hard switch module 140, and an electronic switch module 150. The voltage comparison module 100 is used to compare the output voltage of the power supply module 160 with its own system voltage to obtain a first-level enable signal; the logic gate circuit module 110 is used to perform a logical operation on the first-level enable signal output by the voltage comparison module 100 and the soft switch signal output by the control module 130 to obtain a second-level enable signal; the logic gate circuit module 110 is further used to perform a logical operation on the second-level enable signal and the hard switch signal output by the hard switch module 140 to obtain a third-level enable signal; and the electronic switch module 150 is used to, upon receiving the third-level enable signal, output voltage from the power supply module 160 to the gold finger board 170 for power supply.

[0047] It is understandable that the system voltage of the power supply module 160 itself is the maximum system voltage, and the maximum system voltage can be divided by an LDO (Low Dropout Regulator) to obtain a stable value.

[0048] In actual applications, the power supply module 160 is used to provide at least one output voltage and at least one self-system voltage. When the self-system voltage of the power supply module 160 exceeds the output voltage, it outputs a first-level enable signal, performs a logical operation on the first-level enable signal and the soft switching signal output by the control module 130, outputs a second-level enable signal, performs a logical operation on the second-level enable signal and the hard switching signal output by the hard switching module 140, and outputs a third-level enable signal. Finally, when the third-level enable signal is received, the power supply module 160 outputs voltage to the gold finger board 170 through the electronic switch 151 of the electronic switch module 150 for power supply.

[0049] The descriptions of “first” and “second” in the above-mentioned first enable signal and second enable signal are only for distinguishing different enable signals obtained by different modules in different situations.

[0050] The gold finger power control circuit of this embodiment receives three levels of enable signals in sequence. When receiving the third level enable signal, it acts on the electronic switch 151 of the electronic switch module 150, and then inputs the output voltage of the power supply module 160 to the gold finger board 170 through the electronic switch 151 for power supply. This avoids damage to the daughter board caused by power instability or operational errors during the process of manually plugging and unplugging the gold finger board 170, thereby improving operational safety and device stability.

[0051] Alternatively, as Figure 3As shown, the FPC power control circuit further includes: a power supply module 160. Among them, the input terminal of the output voltage in the power supply module 160 is connected to the inverting input terminal of the voltage comparison module 100, the voltage output terminal of the output voltage in the power supply module 160 is connected to the second input terminal of the electronic switch module 150, and the output terminal of the self-system voltage of the power supply module 160 is connected to the non-inverting input terminal of the voltage comparison module 100.

[0052] In one embodiment, as Figure 3 shown, the voltage comparison module 100 in the FPC power control circuit includes: a comparator 101. Among them, the inverting input terminal of the comparator 101 is connected to the output voltage of the power supply module 160, the non-inverting input terminal of the comparator 101 is connected to the self-system voltage of the power supply module 160, and the output terminal of the comparator 101 is connected to the logic gate circuit module 110. The comparator 101 is configured to output a first-level enable signal with a high level when the self-system voltage of the power supply module 160 exceeds the output voltage. At this time, the output voltage of the power supply module 160 is normal in the comparator 101. The comparator 101 is further configured to output a first-level enable signal with a low level when the output voltage of the power supply module 160 exceeds the self-system voltage. At the same time, during the subsequent working process, no matter what high or low level signal is input, the third-level enable signal output through the logic gate circuit module 110 is always low. At this time, the electronic switch 151 is in a closed state, that is, the power supply module 160 cannot output voltage to the electronic switch 151 to supply power to the FPC board 170, so as to achieve the purpose of protecting the FPC board 170.

[0053] It can be understood that considering the problem that the FPC board 170 is easily damaged due to excessive voltage, an overvoltage protection circuit is built by the comparator 101 to avoid damage caused by excessive voltage. Among them, the voltage comparison module 100 includes at least one comparator 101, and the number and model of the comparator 101 can be set according to specific requirements. For example, comparator chips of companies such as ON semi, Texas Instruments (TI), and Analog Devices (ADI) can be selected.

[0054] In this embodiment, through at least one comparator 101, the output voltage of the power supply module 160 can be accurately compared with the self-system voltage to obtain a first-level enable signal, so as to receive the second enable signal and the third enable signal in subsequent work. Furthermore, when the third-level enable signal is received, the output voltage of the power supply module 160 is sent to the FPC board 170 through the electronic switch 151 for power supply. At the same time, it avoids the phenomenon of sub-board damage that may be caused by unstable power supply or operation errors during the process of manually inserting and removing the FPC board 170, improving the safety of operation and the stability of the device.

[0055] In one embodiment, as Figure 4 shown, the logic gate circuit module 110 in the gold finger power control circuit includes: a first logic gate unit 111 and a second logic gate unit 112; wherein, the first input terminal of the first logic gate unit 111 is connected to the output terminal of the comparator 101 in the voltage comparison module 100, the second input terminal of the first logic gate unit 111 is connected to the output terminal of the control module 130, the output terminal of the first logic gate unit 111 is connected to the first input terminal of the second logic gate unit 112, the first input terminal of the second logic gate unit 112 is connected to the output terminal of the first logic gate unit 111, the second input terminal of the second logic gate unit 112 is connected to the hard switch module 140, and the output terminal of the second logic gate unit 112 is connected to the first input terminal of the electronic switch 151;

[0056] The first input terminal of the first logic gate unit 111 is used to receive a first-stage enable signal, and the second input terminal of the first logic gate unit 111 receives a soft switch signal. Wherein, when both the first-stage enable signal and the soft switch signal are at a high level, the output terminal of the first logic gate unit 111 outputs a second-stage enable signal. The first input terminal of the second logic gate unit 112 is used to receive the second-stage enable signal, and the second input terminal of the second logic gate unit 112 is used to receive a hard switch signal. Wherein, when both the second-stage enable signal and the hard switch signal are at a high level, the output terminal of the second logic gate unit 112 outputs a third-stage enable signal.

[0057] In practical applications, the above-mentioned logic gate unit can be represented by an AND gate to realize signal transmission. It should be noted that at least two AND gates are included in the logic gate circuit module 110 to realize signal transmission. In other embodiments, the number of AND gates can be set according to specific situations. For example, as Figure 5 shown, the logic gate circuit module 110 includes: a first AND gate 113 and a second AND gate 114; when the first input terminal of the first AND gate 113 receives a first-stage enable signal output by the comparator 101 and the second input terminal of the first AND gate 113 receives a soft switch signal output by the microcontroller 131 and both are at a high level, the output signal of the first AND gate 113 is a high-level signal; otherwise, the output of the first AND gate 113 is a low-level signal.

[0058] When the second input terminal of the first AND gate 113 receives a soft switch signal at a high level output by the microcontroller 131, after being ANDed with the first-stage enable signal output by the comparator 101, the output signal of the first AND gate 113 is a second-stage enable signal at a high level.

[0059] When the second input terminal of the second AND gate 114 receives a hard switch signal with a high level output from the hard switch module 140, after performing an AND operation with the second-stage enable signal with a high level output from the first AND gate 113, the second AND gate 114 outputs a third enable signal with a high level. Among them, the hard switch signal of the hard switch module 140 is at a high level after the gold finger board 170 is installed properly.

[0060] In the gold finger power control circuit of this embodiment, by performing an AND operation on the soft switch signal and the first-stage enable signal to obtain the second-stage enable signal, and performing an AND operation on the hard switch signal and the second-stage enable signal to obtain the third-stage enable signal, it is convenient to apply the third-stage enable signal with a high level to the electronic switch 151 in subsequent operations, so as to input the output voltage of the power supply module 160 to the gold finger board 170 for power supply, avoiding the phenomenon of daughter board damage caused by unstable power supply or operation errors during the process of manually inserting and removing the gold finger board 170, thereby improving the safety of operation and the stability of the device.

[0061] In one embodiment, as Figure 6 shown, the electronic switch module 150 in the gold finger power control circuit includes: at least one electronic switch 151; among them, the controlled terminal of the electronic switch 151 is connected to the output terminal of the second logic gate unit 112, the signal input terminal of the electronic switch 151 is connected to the voltage output terminal of the power supply module 160, and the signal output terminal of the electronic switch 151 is connected to the power input terminal of the gold finger board 170;

[0062] When receiving the third-stage enable signal and the hard switch signal with a high level output from the hard switch module 140, control the electronic switch 151 to conduct, so that the output voltage of the power supply module 160 is output to the gold finger board 170 for power supply;

[0063] When both the second-stage enable signal and the third-stage enable signal are at a high level, input the output voltage of the power supply module 160 to the gold finger board 170 through the electronic switch 151 for power supply;

[0064] When both the second-stage enable signal and the third-stage enable signal are not at a high level, disconnect the output voltage of the power supply module 160 input to the gold finger board 170 through the electronic switch 151 for power supply.

[0065] It can be understood that the electronic switch 151 is used to receive a switch signal and conduct power supply to the gold finger board 170 according to the switch signal. When the electronic switch 151 is used to input the output voltage of the power supply module 160 to the gold finger board 170 through the electronic switch 151 for power supply after receiving the third-stage enable signal. Thus, the phenomenon of daughter board damage caused by unstable power supply or operation errors during the process of manually inserting and removing the gold finger board 170 is avoided, and the safety of operation and the stability of the device are improved.

[0066] The gold finger power control circuit of this embodiment further avoids the phenomenon of daughter board damage caused by unstable power supply or operation errors during the manual insertion and removal of the gold finger board 170 by considering the cases where the enable signals are all high levels and not all high levels, thereby improving the operation safety and the stability of the device.

[0067] Optionally, the electronic switch 151 is any one of a MOSFET tube and a load switch tube to quickly respond to the switch signal, thereby realizing the on-off control of the circuit. At the same time, the electronic switch 151 also has the functions of protecting the circuit, saving energy and reducing consumption, and improving the reliability of the circuit.

[0068] In one embodiment, as Figure 6 shown, the control module 130 in the gold finger power control circuit includes: a microcontroller 131. Among them, the output end of the microcontroller 131 is connected to the second input end of the first logic gate unit 111; when both the soft switch signal and the first-stage enable signal output by the microcontroller 131 are high levels, the output end of the first logic gate unit 111 outputs a second-stage enable signal.

[0069] In practical applications, when and only when the soft switch signal output by the microcontroller 131 and the first-stage enable signal are both high levels, the output end of the first logic gate unit 111 will generate a high-level signal, and this high-level signal is defined as the second-stage enable signal. If the soft switch signal output by the microcontroller 131 is at a low level, regardless of whether the first-stage enable signal is at a high level or a low level, the third-stage enable signal obtained after logical operation is always at a low level, and the electronic switch is in the off state. And when the soft switch signal with a high level output by the microcontroller 131 and the first-stage enable signal with a high level output by the comparator 101 pass through the first logic gate unit 111, a second-stage enable signal is output.

[0070] Optionally, the microcontroller 131 is any one of an FPGA, a CPLD, and an MCU to realize the output of signals, thereby enhancing the reliability of the gold finger power control circuit.

[0071] The gold finger power control circuit of this embodiment further defines that when the soft switch signal with a high level output by the microcontroller 131 and the first-stage enable signal with a high level output by the comparator 101 pass through the first logic gate unit 111, the output second-stage enable signal is still at a high level; conversely, when the soft switch signal with a low level output by the microcontroller 131, regardless of the level of the first-stage enable signal, the third-stage enable signal output in subsequent operations is always at a low level.

[0072] In one embodiment, as Figure 6As shown in the figure, the hard switch module 140 in the gold finger power control circuit includes: a hard switch 141 with a switch bounce stroke, where the hard switch 141 is disposed below the gold finger board 170; when the gold finger board 170 presses down the hard switch 141, the hard switch module 140 outputs a high-level signal, and when the gold finger board 170 does not press down the hard switch 141, the hard switch module 140 outputs a low-level signal.

[0073] In practical applications, when the gold finger board 170 presses down the hard switch 141, the top of the hard switch 141 is pressed down, the hard switch 141 is closed, and the control electronic switch 151 is turned on to enable the power supply module 160 to output voltage to the gold finger board 170 for power supply; when the gold finger board 170 does not press down the hard switch 141, the top of the hard switch 141 returns to its original position, the hard switch 141 is disconnected, and the control electronic switch 151 cannot be turned on to enable the power supply module 160 to output voltage to the gold finger board 170 for power supply.

[0074] Further, when the gold finger board 170 presses down the hard switch 141 and the switch is in the closed state, the hard switch 141 outputs a high-level signal. When the received second-level enable signal is a high-level signal, the second logic gate unit 112 outputs a third-level enable signal that is high level, thereby controlling the electronic switch 151 to turn on to enable the power supply module 160 to output voltage to the gold finger board 170 for power supply; when the gold finger board 170 does not press down the hard switch 141, the switch is in the non-closed state, and the signal output by the hard switch 141 is low level. Then, regardless of the level of the second-level enable signal, the output third-level enable signal is always low level.

[0075] The gold finger power control circuit of this embodiment controls the on / off of the power supply of the gold finger board 170 by setting the hard switch 141 below the gold finger board 170, avoiding the phenomenon of daughter board damage caused by unstable power supply or operation errors during the process of manually plugging and unplugging the gold finger board 170, thereby improving the operation safety and the stability of the device.

[0076] The embodiment of the present application also provides a gold finger power control device, as Figure 9 shown, the gold finger power control device includes the gold finger power control circuit mentioned in any of the above embodiments. In practical applications, when a gold finger board 170 requires multiple power supplies, such as two-way, three-way, four-way, etc., the number of gold finger power control circuits is equal to the number of power supply modules 160 required by the gold finger board 170. For example, as Figure 7As shown, the first voltage comparison module 190 is used to compare the output voltage of the first power supply module with its own system voltage to obtain a first-stage enable signal; the first logic gate circuit module 200 is used to perform a logic operation on the first-stage enable signal output by the first voltage comparison module 190 and the soft-switching signal output by the first control module 210 to obtain a second-stage enable signal; the first logic gate circuit module 200 is also used to perform a logic operation on the second-stage enable signal and the hard-switching signal output by the hard-switching module 140 to obtain a third-stage enable signal; the first electronic switch module 220 is used to supply the output voltage of the first power supply module 230 to the gold finger board 170 for power supply when receiving the third-stage enable signal.

[0077] The second voltage comparison module 240 is used to compare the output voltage of the second power supply module 280 with its own system voltage to obtain a first-stage enable signal; the second logic gate circuit module 250 is used to perform a logic operation on the first-stage enable signal output by the second voltage comparison module 240 and the soft-switching signal output by the second control module 260 to obtain a second-stage enable signal; the second logic gate circuit module 250 is also used to perform a logic operation on the second-stage enable signal and the hard-switching signal output by the hard-switching module 140 to obtain a third-stage enable signal; the second electronic switch module 270 is used to supply the output voltage of the second power supply module 280 to the gold finger board 170 for power supply when receiving the third-stage enable signal.

[0078] It can be understood that if there are timing requirements, delay processing can be performed on the first control module 210 and the second control module 260. When the gold finger board 170 pops up, the gold finger board 170 releases the pressed hardware switch, the hardware switch disconnects, the third-stage enable signal is at a low level, and the voltages input from the first power supply module 230 and the second power supply module 280 to their respective corresponding electronic switches for powering the gold finger board 170 are disconnected, achieving the protection purpose.

[0079] When the inputs of the first control module 210 and the second control module 260 are at a low level, the third-stage enable signal is at a low level, and the voltages input from the first power supply module 230 and the second power supply module 280 to their respective corresponding electronic switches for powering the gold finger board 170 are disconnected.

[0080] When the output voltage of the first power supply module 230 exceeds its own system voltage and the third-stage enable signal is at a low level, the output voltage input to the gold finger board 170 through the first electronic switch for power supply is disconnected, achieving the protection purpose. When the output voltage of the second power supply module 280 exceeds its own system voltage and the third-stage enable signal is at a low level, the output voltage input to the gold finger board 170 through the second electronic switch for power supply is disconnected, achieving the protection purpose.

[0081] As an alternative solution, as Figure 7 shown, the multiple gold finger power control circuits share a hard switch module 140 to control a gold finger board 170, which can save costs. If multiple gold finger boards 170 need to be controlled, optionally, multiple such gold finger power control devices can be adopted. It should be noted that each hard switch module 140 can only be used to control one gold finger board 170, and in other embodiments, multiple gold finger power control circuits can also share a control module.

[0082] As an alternative solution, as Figure 8 shown, the system voltage 290 of path A is normally powered, and the system voltage 370 of path B is normally powered: when the voltage 350 of path A is normally powered, the A comparator 300 outputs a first-stage enable signal with a high level. The A software switch 310 outputs a high-level signal, and after being ANDed with the A comparator 300, the A AND gate 320 outputs a second-stage enable signal with a high level. The hardware automatic switch 360 becomes high level after the gold finger daughter board 440 is installed. After being ANDed with the second-stage enable signal with a high level output by the A AND gate 320, the B AND gate 330 outputs a third-stage enable signal with a high level. The third-stage enable signal acts on the A electronic switch 340, and the switch is turned on. The voltage 350 of path A is output to the gold finger daughter board 440 through the A electronic switch 340.

[0083] When the voltage 430 of path B is normally powered, the B comparator 380 outputs a second-stage enable signal with a high level. The B software switch 390 outputs a high-level signal, and after being ANDed with the B comparator 380, the C AND gate 400 outputs a third-stage enable signal with a high level. The hardware automatic switch 360 becomes high level after the gold finger daughter board 440 is installed. After being ANDed with the second-stage enable signal with a high level output by the C AND gate 400, the D AND gate 410 outputs a third-stage enable signal with a high level. The third-stage enable signal acts on the B electronic switch 420, and the switch is turned on. The voltage 430 of path B is output to the gold finger daughter board 440 through the B electronic switch 420.

[0084] It can be understood that if there are timing requirements, the required delay processing can be performed on the A software switch 310 and the B software switch 390. When the gold finger daughter board 440 pops up, the gold finger board releases the pressed hardware switch, the hardware switch disconnects, the third-level EN output is low, and the power supplies of the A path and the B path are disconnected, achieving the protection purpose. When the inputs of the A software switch 310 and the B software switch 390 are low, the third-level EN output is low, and the power supplies of the A path and the B path are disconnected. When the actual output voltage of the A path exceeds the system maximum voltage value, the third-level EN output is low, and the power supply of the A path is disconnected, achieving the protection purpose. When the actual output voltage of the B path exceeds the system maximum voltage value, the third-level EN output is low, and the power supply of the B path is disconnected, achieving the protection purpose.

[0085] The gold finger power control device of the embodiment of the present application includes a gold finger power control circuit 10, which sequentially receives three levels of enable signals. When receiving the third-level enable signal, this signal is applied to the electronic switch 151, and then the output voltage of the power supply module 160 is input to the gold finger board 170 through the electronic switch 151 for power supply, avoiding the damage of the daughter board caused by unstable power supply or operation errors during the artificial plugging and unplugging of the gold finger board 170, thereby improving the operation safety and the stability of the device.

[0086] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application.

Claims

1. A gold finger power control circuit, characterized in that, Including: A voltage comparison module, a logic gate circuit module, a control module, a hard switch module, and an electronic switch module; The voltage comparison module is used to compare the to-be-output voltage of the power supply module with its own system voltage to obtain a first-level enable signal; The logic gate circuit module is used to perform a logic operation on the first-level enable signal output by the voltage comparison module and the soft switch signal output by the control module to obtain a second-level enable signal; The logic gate circuit module is further used to perform a logic operation on the second-level enable signal and the hard switch signal output by the hard switch module to obtain a third-level enable signal; The electronic switch module is used to supply the output voltage of the power supply module to the gold finger board for power supply when receiving the third-level enable signal.

2. The gold finger power control circuit according to claim 1, wherein The voltage comparison module includes a comparator; The inverting input terminal of the comparator is used to access the output voltage of the power supply module, the non-inverting input terminal of the comparator is used to access the self-system voltage of the power supply module, and the output terminal of the comparator is connected to the logic gate circuit module; Wherein, when the self-system voltage of the power supply module exceeds the output voltage, the first-level enable signal with a high level is output.

3. The gold finger power control circuit according to claim 2, wherein The logic gate circuit module includes a first logic gate unit and a second logic gate unit; The first input terminal of the first logic gate unit is connected to the output terminal of the comparator, the second input terminal of the first logic gate unit is connected to the output terminal of the control module, and the output terminal of the first logic gate unit is connected to the first input terminal of the second logic gate unit; The first input terminal of the second logic gate unit is connected to the output terminal of the first logic gate unit, the second input terminal of the second logic gate unit is connected to the output terminal of the hard switch module, and the output terminal of the second logic gate unit is connected to the first input terminal of the electronic switch; The first input terminal of the first logic gate unit is used to receive the first-level enable signal, and the second input terminal of the first logic gate unit receives the soft switch signal. Wherein, when both the first-level enable signal and the soft switch signal are at a high level, the output terminal of the first logic gate unit outputs the second-level enable signal with a high level; The first input terminal of the second logic gate unit is used to receive the second-level enable signal, and the second input terminal of the second logic gate unit is used to receive the hard switch signal. Wherein, when both the second-level enable signal and the hard switch signal are at a high level, the output terminal of the second logic gate unit outputs the third-level enable signal with a high level.

4. The gold finger power control circuit according to claim 3, wherein The control module includes a microcontroller, and the output terminal of the microcontroller is connected to the second input terminal of the first logic gate unit; When both the soft switch signal output by the microcontroller and the first-level enable signal are at a high level, the output terminal of the first logic gate unit outputs the second-level enable signal.

5. The gold finger power control circuit according to claim 4, wherein The microcontroller is any one of FPGA, CPLD, and MCU.

6. The gold finger power control circuit according to claim 1, characterized in that: The hard switch module includes a hard switch with a switch bounce stroke, and the hard switch is arranged under the gold finger board; When the gold finger board presses down the hard switch, the hard switch module outputs a high-level signal. When the gold finger board does not press down the hard switch, the hard switch module outputs a low-level signal.

7. The gold finger power control circuit according to claim 3, characterized in that: The electronic switch module includes at least one electronic switch; The controlled end of the electronic switch is connected to the output end of the second logic gate unit. The signal input end of the electronic switch is connected to the voltage output end of the power supply module. The signal output end of the electronic switch is connected to the power input end of the gold finger board; The electronic switch is used to conduct when receiving the effective third-level enable signal, so that the power supply module outputs voltage to the gold finger board for power supply.

8. The gold finger power control circuit according to claim 7, characterized in that: The electronic switch is any one of a MOSFET tube and a load switch tube.

9. A gold finger power control device, characterized in that: It includes at least one gold finger power control circuit according to any one of claims 1 to 8, wherein the number of the gold finger power control circuits is equal to the number of the power supply modules required by the gold finger board.

10. The gold finger power control device according to claim 9, characterized in that, Multiple said gold finger power control circuits share one said hard switch module.

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