Novel RF-DC cross coupling rectifier

Abstract

The utility model belongs to the technical field of integrated circuit design, and particularly relates to a novel RF-DC cross-coupling rectifier, which comprises a single-stage cross-coupling rectifying circuit, and the single-stage cross-coupling rectifying circuit comprises an auxiliary booster circuit, a main cross-coupling rectifying circuit and an auxiliary step-down circuit. And bias voltage is increased for grid electrodes of the transistor MN1 and the transistor MN2 through the auxiliary booster circuit so as to compensate high turn-on voltage of the transistor MN1 and the transistor MN2, so that the transistor MN1 and the transistor MN2 can be quickly turned on and turned off.

Description

Technical Field

[0001] This utility model belongs to the field of integrated circuit design technology, specifically relating to a novel RF-DC cross-coupled rectifier. Background Technology

[0002] With the advancement of science and technology, RF-DC rectification, as a key component of radio frequency (RF) collectors, has made significant progress. However, this also places higher demands on the boosting effect and stability of its internal circuitry. The rectifier circuit plays a crucial role in boosting the received signal and improving the stability of the output voltage in the RF collector. When the rectifier circuit fails to provide a stable voltage, it cannot provide a stable voltage for subsequent circuits, which directly affects the performance of the RF signal collector.

[0003] Traditional cross-coupled rectifiers have poor boost performance and large output voltage ripple, resulting in poor output voltage stability and preventing the output voltage from reaching the required operating voltage of the equipment. Furthermore, traditional cross-coupled rectifiers also exhibit reverse leakage current, which reduces the output voltage and leads to output voltage instability. Utility Model Content

[0004] This invention provides a novel RF-DC cross-coupled rectifier to address the aforementioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A novel RF-DC cross-coupled rectifier includes a single-stage cross-coupled rectifier circuit. The single-stage cross-coupled rectifier circuit comprises an auxiliary boost circuit, a main cross-coupled rectifier circuit, and an auxiliary buck circuit. Terminal 10 of the auxiliary boost circuit is connected to a first input terminal 3, terminal 11 of the auxiliary boost circuit is connected to a second input terminal 4, terminal 13 of the auxiliary boost circuit is connected to a terminal 15 of the main cross-coupled rectifier circuit, and terminal 12 of the auxiliary boost circuit is connected to a terminal 16 of the main cross-coupled rectifier circuit. Terminal 17 of the cross-coupled rectifier circuit is connected to the first input terminal 3; terminal 18 of the main cross-coupled rectifier circuit is connected to the second input terminal 4; terminal 19 of the main cross-coupled rectifier circuit is connected to terminal 21 of the auxiliary step-down circuit; terminal 20 of the main cross-coupled rectifier circuit is connected to terminal 22 of the auxiliary step-down circuit; terminal 23 of the auxiliary step-down circuit is connected to the first input terminal 3; terminal 24 of the auxiliary step-down circuit is connected to the second input terminal 4; and terminal 25 of the auxiliary step-down circuit is connected to the output terminal 5.

[0007] Furthermore, the auxiliary boost circuit includes coupling capacitor Cc1, coupling capacitor Cc2, transistor MN3, and transistor MN4. One end of coupling capacitor Cc1 is connected to terminal 10, and the other end is connected to the drain of transistor MN3. One end of coupling capacitor Cc2 is connected to terminal 11, and the other end is connected to the drain of transistor MN4. The gate of transistor MN3 is connected to the drain of transistor MN4 and is connected to terminal 13. The source of transistor MN3 is connected to terminal 14. The gate of transistor MN4 is connected to the drain of transistor MN3 and is connected to terminal 12. The source of transistor MN4 is connected to terminal 14. Both transistors MN3 and MN4 are N-type MOS transistors.

[0008] Furthermore, the main cross-coupled rectifier circuit includes coupling capacitor C1, coupling capacitor C2, transistors MN1, MN2, MN5, MN6, MN7, MN8, MP1, and MP2. One end of coupling capacitor C1 is connected to terminal 17, and the other end is connected to the drains of transistors MN1 and MP1. One end of coupling capacitor C2 is connected to terminal 18, and the other end is connected to the drains of transistors MN2 and MP2. The gate of transistor MN1 is connected to the drain and gate of transistor MN5 and is connected to terminal 15. The source of transistor MN1 is connected to the source of transistor MN5 and is connected to terminal 14. The gate of transistor MN2 is connected to the drain and gate of transistor MN6. The transistors are connected to terminal 16. The source of transistor MN2 is connected to the source of transistor MN6 and connected to terminal 14. The gate of transistor MP1 is connected to the drain and gate of transistor MN7 and connected to terminal 19. The source of transistor MP1 is connected to the source of transistor MN7 and connected to terminal 25. The gate of transistor MP2 is connected to the drain and gate of N-type MOS transistor MN8 and connected to terminal 20. The source of transistor MP2 is connected to the source of transistor MN8 and connected to terminal 25. Transistors MN1, MN2, MN5, MN6, MN7, and MN8 are all N-type MOS transistors, and transistors MP1 and MP2 are both P-type MOS transistors.

[0009] Furthermore, the auxiliary step-down circuit includes coupling capacitor Cc3, coupling capacitor Cc4, transistor MP3, and transistor MP4. One end of coupling capacitor Cc3 is connected to terminal 23, and the other end is connected to the drain of transistor MP3. One end of coupling capacitor Cc4 is connected to terminal 24, and the other end is connected to the drain of transistor MP4. The gate of transistor MP3 is connected to the drain of transistor MP4 and is connected to terminal 21. The source of transistor MP3 is connected to terminal 25. The gate of transistor MP4 is connected to the drain of transistor MP3 and is connected to terminal 22. The source of transistor MP4 is connected to terminal 25. Both transistor MP3 and transistor MP4 are P-type MOS transistors.

[0010] Furthermore, the single-stage cross-coupled rectifier circuit has three terminals. Terminals 10 and 11 in each individual rectifier circuit are connected to the first input terminal 3 and the second input terminal 4. Terminal 14 in the first-stage individual rectifier circuit is grounded. Terminals 14 in the second and third stages are connected to terminal 25 in the previous stage individual rectifier circuit. Terminal 25 in the last stage individual rectifier circuit is connected to the output terminal 5.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] In a single-stage cross-coupled rectifier circuit, this invention uses transistors MN5, MN6, MN7, and MN8 as diode feedback components. By utilizing the characteristics of diodes, the voltage difference between the source and gate of transistors MN1 and MN2 is increased, while the voltage difference between the source and gate of transistors MP1 and MP2 is decreased. This improves their reverse conduction conditions, reduces reverse leakage current, and results in a higher and more stable output voltage, thereby enhancing the boost effect and stability of the rectifier.

[0013] This invention includes an auxiliary boost circuit, which adds a bias voltage to the gates of transistors MN1 and MN2 to compensate for their high turn-on voltage, enabling transistors MN1 and MN2 to turn on and off quickly.

[0014] The single-stage cross-coupled rectifier circuit in this invention utilizes the alternating conduction characteristics of N-type MOS transistors to continuously rectify the input differential RF signal, and achieves a boost effect through the energy storage characteristics of coupling capacitors C1 and C2.

[0015] This invention incorporates an auxiliary step-down circuit, which adds a bias voltage to the gates of transistors MP1 and MP2 to compensate for their turn-on voltage. This allows transistors MP1 and MP2 to turn on and off quickly. With a differential input amplitude of 1V, the output voltage of its single-stage cross-coupled rectifier circuit can reach 1.72V, and the ripple coefficient can be below 0.3%, resulting in a higher and more stable output voltage.

[0016] The single-stage cross-coupled rectifier circuit of this invention can be optionally configured as three. By combining three single-stage cross-coupled rectifier circuits to form a multi-stage rectifier structure, the output voltage can reach 5.13V and the ripple coefficient can reach below 0.1%. It has good boost effect, low ripple coefficient and more stable output voltage. Attached Figure Description

[0017] Figure 1 This is a diagram showing the usage state of this utility model;

[0018] Figure 2 This is a diagram of the internal framework of this utility model;

[0019] Figure 3 This is a circuit diagram of the auxiliary boost circuit in this utility model;

[0020] Figure 4 This is a circuit diagram of the main cross-coupled rectifier circuit in this utility model;

[0021] Figure 5 This is a circuit diagram of the auxiliary step-down circuit in this utility model;

[0022] Figure 6 This is the overall circuit diagram of this utility model;

[0023] Figure 7 This is a framework diagram of the multi-stage rectifier structure of this utility model. Detailed Implementation

[0024] To further illustrate the technical solution of this utility model, the following embodiments will be used to further explain this utility model.

[0025] Example 1

[0026] like Figures 1 to 5As shown, a novel RF-DC cross-coupled rectifier includes a single-stage cross-coupled rectifier circuit. The single-stage cross-coupled rectifier circuit includes an auxiliary boost circuit, a main cross-coupled rectifier circuit, and an auxiliary buck circuit. Terminal 10 of the auxiliary boost circuit is connected to the first input terminal 3, terminal 11 of the auxiliary boost circuit is connected to the second input terminal 4, terminal 13 of the auxiliary boost circuit is connected to the terminal 15 of the main cross-coupled rectifier circuit, and terminal 12 of the auxiliary boost circuit is connected to the terminal 16 of the main cross-coupled rectifier circuit. Terminal 17 of the main cross-coupled rectifier circuit is connected to the first input terminal 3. Terminal 18 of the main cross-coupled rectifier circuit is connected to the second input terminal 4. Terminal 19 of the main cross-coupled rectifier circuit is connected to the terminal 21 of the auxiliary step-down circuit. Terminal 20 of the main cross-coupled rectifier circuit is connected to the terminal 22 of the auxiliary step-down circuit. Terminal 23 of the auxiliary step-down circuit is connected to the first input terminal 3. Terminal 24 of the auxiliary step-down circuit is connected to the second input terminal 4. Terminal 25 of the auxiliary step-down circuit is connected to the output terminal 5.

[0027] The auxiliary boost circuit includes coupling capacitor Cc1, coupling capacitor Cc2, transistor MN3, and transistor MN4. One end of coupling capacitor Cc1 is connected to terminal 10, and the other end is connected to the drain of transistor MN3. One end of coupling capacitor Cc2 is connected to terminal 11, and the other end is connected to the drain of transistor MN4. The gate of transistor MN3 is connected to the drain of transistor MN4 and is connected to terminal 13. The source of transistor MN3 is connected to terminal 14. The gate of transistor MN4 is connected to the drain of transistor MN3 and is connected to terminal 12. The source of transistor MN4 is connected to terminal 14. Both transistors MN3 and MN4 are N-type MOS transistors.

[0028] The main cross-coupled rectifier circuit includes coupling capacitor C1, coupling capacitor C2, transistors MN1, MN2, MN5, MN6, MN7, MN8, MP1, and MP2. One end of coupling capacitor C1 is connected to terminal 17, and the other end is connected to the drains of transistors MN1 and MP1. One end of coupling capacitor C2 is connected to terminal 18, and the other end is connected to the drains of transistors MN2 and MP2. The gate of transistor MN1 is connected to the drain and gate of transistor MN5 and is connected to terminal 15. The source of transistor MN1 is connected to the source of transistor MN5 and is connected to terminal 14. The gate of transistor MN2 is connected to the drain and gate of transistor MN6. The source of transistor MN2 is connected to the source of transistor MN6 and connected to terminal 14. The gate of transistor MP1 is connected to the drain and gate of transistor MN7 and connected to terminal 19. The source of transistor MP1 is connected to the source of transistor MN7 and connected to terminal 25. The gate of transistor MP2 is connected to the drain and gate of N-type MOS transistor MN8 and connected to terminal 20. The source of transistor MP2 is connected to the source of transistor MN8 and connected to terminal 25. Transistors MN1, MN2, MN5, MN6, MN7, and MN8 are all N-type MOS transistors, and transistors MP1 and MP2 are both P-type MOS transistors.

[0029] The auxiliary step-down circuit includes coupling capacitor Cc3, coupling capacitor Cc4, transistor MP3, and transistor MP4. One end of coupling capacitor Cc3 is connected to terminal 23, and the other end is connected to the drain of transistor MP3. One end of coupling capacitor Cc4 is connected to terminal 24, and the other end is connected to the drain of transistor MP4. The gate of transistor MP3 is connected to the drain of transistor MP4 and is connected to terminal 21. The source of transistor MP3 is connected to terminal 25. The gate of transistor MP4 is connected to the drain of transistor MP3 and is connected to terminal 22. The source of transistor MP4 is connected to terminal 25. Both transistor MP3 and transistor MP4 are P-type MOS transistors.

[0030] Example 2

[0031] like Figure 6As shown, there are three single-stage cross-coupled rectifier circuits. Terminals 10 and 11 in each individual rectifier circuit are connected to the first input terminal 3 and the second input terminal 4. Terminal 14 in the first-stage individual rectifier circuit is grounded. Terminals 14 in the second and third stages are connected to terminal 25 in the previous stage individual rectifier circuit. Terminal 25 in the last stage individual rectifier circuit is connected to the output terminal 5.

[0032] The working principle is as follows:

[0033] The single-stage cross-coupled rectifier circuit includes an auxiliary boost circuit, a main cross-coupled rectifier circuit, and an auxiliary buck circuit. The auxiliary boost circuit generates boosted V13 and V12 voltages at terminals 13 and 12, respectively, which helps to increase the overdrive voltages of transistors MN1 and MN2. When the input signal at terminal 10 periodically increases by +V... RF When / 2 becomes negative, the positive current in the auxiliary boost circuit will generate a reference voltage V. REF1 This reduces the turn-on resistance and increases the forward current. Therefore, the resulting V12 voltage will be higher than the reference voltage value based on the input voltage, as shown in formula (1):

[0034]

[0035] The auxiliary step-down circuit generates boosted V21 and V22 voltages at terminals 21 and 22, respectively, which helps reduce the overdrive voltages of transistors MP1 and MP2. When the input signal at terminal 24 periodically -V RF When / 2 becomes positive, the forward current in the auxiliary step-down circuit will generate a reference voltage V. REF2 This reduces the turn-on resistance and increases the forward current. Therefore, the resulting V21 voltage will be lower than the reference voltage value based on the input voltage, as shown in formula (2):

[0036]

[0037] Among them, V OUT This is the DC output voltage.

[0038] The diode feedback circuit in the main cross-coupled rectifier circuit adds an N-type MOS transistor between the gate and source of the main rectifier diode. Taking transistor MP1 as an example, when the output voltage gradually increases, transistor MN7 connected to transistor MP1 turns on, and its drain voltage and gate voltage are as shown in formulas (3) and (4):

[0039]

[0040]

[0041] The voltage difference V between the gate and source of transistor MP1 SG As shown in formula (5):

[0042]

[0043] Significantly reduced V during reverse conduction of transistor MP1 SG This reduces leakage current, increases output voltage to achieve better boost characteristics, and reduces output voltage ripple, making the output voltage more stable.

[0044] The multi-stage rectification structure includes three identical single-stage cross-coupled rectifier circuits. Each subsequent single-stage cross-coupled rectifier circuit continuously boosts the output voltage of the previous single-stage cross-coupled rectifier circuit to achieve a higher output voltage.

[0045] The foregoing has shown and described the main features and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel RF-DC cross-coupled rectifier, characterized in that: The system includes a single-stage cross-coupled rectifier circuit, comprising an auxiliary boost circuit, a main cross-coupled rectifier circuit, and an auxiliary buck circuit. In the auxiliary boost circuit, one end of coupling capacitor Cc1 is connected to one output terminal of the differential signal generator. One end of coupling capacitor Cc2 in the auxiliary boost circuit is connected to the other output terminal of the differential signal generator. The gate of transistor MN3 in the auxiliary boost circuit is connected to the drain of transistor MN4, and is also connected to the gate of transistor MN1 and the drain and gate of transistor MN5 in the main cross-coupled rectifier circuit. The gate of transistor MN4 in the auxiliary boost circuit is connected to the drain of transistor MN3, and is also connected to the gate of transistor MN2 and the drain and gate of transistor MN6 in the main cross-coupled rectifier circuit. One end of coupling capacitor C1 in the main cross-coupled rectifier circuit is connected to one output terminal of the differential signal generator. One output terminal is connected, one end of the coupling capacitor C2 in the main cross-coupled rectifier circuit is connected to the other output terminal of the differential signal generator, the gate of transistor MP1 in the main cross-coupled rectifier circuit is connected to the drain and gate of transistor MN7, and is connected to the gate of transistor MP3 and the drain of transistor MP4 in the auxiliary buck circuit, the gate of transistor MP2 in the main cross-coupled rectifier circuit is connected to the drain and gate of N-type MOS transistor MN8, and is connected to the gate of transistor MP4 and the drain of transistor MP3 in the auxiliary buck circuit, one end of the coupling capacitor Cc3 in the auxiliary buck circuit is connected to one output terminal of the differential signal generator, one end of the coupling capacitor Cc4 in the auxiliary buck circuit is connected to the other output terminal of the differential signal generator, and the source of transistor MP3 in the auxiliary buck circuit is connected to the load and the DC voltage output terminal.

2. The novel RF-DC cross-coupled rectifier according to claim 1, characterized in that: The auxiliary boost circuit includes coupling capacitor Cc1, coupling capacitor Cc2, transistor MN3, and transistor MN4. The other end of coupling capacitor Cc1 is connected to the drain of transistor MN3, the other end of coupling capacitor Cc2 is connected to the drain of transistor MN4, the source of transistor MN3 is connected to the source of transistor MN4, and is connected to the source of transistor MN1 in the main cross-coupled rectifier circuit. Both transistor MN3 and transistor MN4 are N-type MOS transistors.

3. A novel RF-DC cross-coupled rectifier according to claim 1, characterized in that: The main cross-coupled rectifier circuit includes coupling capacitor C1, coupling capacitor C2, transistors MN1, MN2, MN5, MN6, MN7, MN8, MP1, and MP2. The other end of coupling capacitor C1 is connected to the drain of transistors MN1 and MP1, and the other end of coupling capacitor C2 is connected to the drain of transistors MN2 and MP2. The sources of transistors MN1, MN5, MN2, and MN6 are interconnected. The sources of transistors MP1, MN7, and MP2 are interconnected with the source of transistor MN8 and are connected to the source of transistor MP3 in the auxiliary step-down circuit. Transistors MN1, MN2, MN5, MN6, MN7, and MN8 are all N-type MOS transistors, and transistors MP1 and MP2 are both P-type MOS transistors.

4. A novel RF-DC cross-coupled rectifier according to claim 1, characterized in that: The auxiliary step-down circuit includes coupling capacitor Cc3, coupling capacitor Cc4, transistor MP3, and transistor MP4. The other end of coupling capacitor Cc3 is connected to the drain of transistor MP3, the other end of coupling capacitor Cc4 is connected to the drain of transistor MP4, and the source of transistor MP3 is connected to the source of transistor MP4. Both transistor MP3 and transistor MP4 are P-type MOS transistors.

5. A novel RF-DC cross-coupled rectifier according to claim 1, characterized in that: The single-stage cross-coupled rectifier circuit has three terminals. In each individual rectifier circuit, one end of the coupling capacitor Cc1 is connected to one of the output terminals of the differential signal generator, and one end of the coupling capacitor Cc2 is connected to the other output terminal of the differential signal generator. In the first stage of the individual rectifier circuit, the source of transistor MN5 is grounded. In the second and third stages, the source of transistor MN5 is connected to the source of transistor MP3 in the previous stage of the individual rectifier circuit. In the last stage of the individual rectifier circuit, the source of transistor MP3 is connected to the load and the DC voltage output terminal.

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