Time sequence controller for controlling power amplifier power supply by negative voltage
By designing a timing controller for the negative voltage control amplifier power supply, using a wide range regulator and a threshold setting regulator, the up and down timing of the negative voltage is accurately controlled, and the problem of inconsistent timing control in the prior art is solved, and high-precision and reliable negative power control are achieved.
Patent Information
- Application Number
- CN202421932114.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-09
AI Technical Summary
The existing timing controllers cannot accurately control the up and down timing of negative voltages, and cannot adjust according to the parameter changes of different amplifier power supplies, resulting in inconsistent control timing of the amplifier power supplies.
A timing controller for controlling the power amplifier power supply with a negative voltage is designed, using a wide range regulator and a threshold setting regulator. The negative voltage and threshold value are compared through a comparator, and the control signal is output to the isolator to accurately control the switch of the power amplifier power supply.
The timing control of the negative power supply is realized first and then down, ensuring the consistency and accuracy of the timing, reducing modulation parameters, and improving the reliability of the control.
Smart Images
Figure CN222916014U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of timing control, and particularly relates to a timing controller for controlling the power supply of an amplifier by negative voltage. Background Art
[0002] According to the working mechanism of a radio frequency power amplifier, modulating and controlling the power supply output at the drain of the amplifier to control the radio frequency power amplifier to output transmission power requires ensuring that there is a negative voltage at the gate of the amplifier and applying a working voltage at the drain of the amplifier to ensure the normal operation of the amplifier. Therefore, a timing controller is needed to control the negative voltage applied to the gate of the amplifier to be powered on before the positive voltage at the drain of the amplifier, that is, the negative voltage needs to be powered on first and then powered off.
[0003] In the prior art, the common timing controller does not control the range of negative voltage control. The control circuit generally has a relatively wide range, and the timing control of power on and off cannot be accurately controlled. For the change of the timing device parameters with negative electricity powering on first and then off, the controller cannot be adjusted. The timing control of power on and off is rough, and the consistency is not good. The power on timing of the power supply of the amplifier cannot be accurately adjusted to be consistent, and different power supplies of the amplifier need to be separately debugged for parameters.
[0004] Therefore, the utility model aims to provide a timing controller for controlling the power supply of an amplifier by negative voltage to solve the above-mentioned related problems. Summary of the Utility Model
[0005] The technical problem to be solved by the utility model is that the existing controller uses a relatively wide range and cannot accurately control the power on and off timing. At the same time, it cannot modulate the controller according to the parameter changes of different power supplies of the amplifier. The purpose is to provide a timing controller for controlling the power supply of an amplifier by negative voltage. Through a wide-range regulator, the range of negative voltage can be adjusted to be applicable to the working conditions of multiple amplifiers and multiple modes. At the same time, through a threshold setting regulator, the negative voltage threshold values of power on and off can be modulated, and the timing control of power on and off is more accurate. The negative voltage output by the wide-range regulator and the negative voltage threshold value of the threshold setting regulator are compared by a comparator, and a control signal for turning on or off the timing is output to an isolator. The isolator isolates and converts the control signal to control the opening or closing of the power switch of the amplifier power supply, thereby completing the reliable control of the power supply of the amplifier power switch, achieving good consistency in the timing control of the negative power supply powering on first and then off, fewer modulation parameters, and high timing accuracy of control.
[0006] The utility model is realized by the following technical solutions:
[0007] A timing controller for a negative voltage controlled power amplifier power supply, comprising a comparator, a wide-range regulator, a threshold setting regulator, an isolation controller and a power amplifier power switch; a first connection end of the wide-range regulator is connected to a detected negative voltage input port, a second connection end of the wide-range regulator is connected to a first connection end of the comparator, and a third connection end of the wide-range regulator is connected to a detected operating power supply input port; a first connection end of the isolation controller is connected to a second connection end of the comparator, and a second connection end of the isolation controller is connected to a first connection end of the power amplifier power switch; an output end of the threshold setting modulator is connected to a third connection end of the comparator; a fourth connection end of the comparator and a third connection end of the isolation controller are both connected to the detected operating power supply input port, a fourth connection end of the isolation controller and a second connection end of the power amplifier power switch are both connected to a power amplifier power input port, and a third connection end of the power amplifier power switch is connected to a power amplifier power output port.
[0008] Further, a power filter is further included, and the power filter is disposed between a fourth connection end of the comparator and the detected operating power supply input port.
[0009] Further, the wide-range regulator includes a first resistor, a second resistor and a first capacitor. A first connection end of the first resistor is connected to the detected operating power supply input port, a second connection end of the first resistor is connected to the comparator, a first connection end of the first capacitor is grounded, a second connection end of the first capacitor is connected to the second connection end of the first resistor, a first connection end of the second resistor is connected to the detected negative voltage input port, and a second connection end of the second resistor is connected to the second connection end of the first capacitor.
[0010] Further, the threshold setting regulator includes a third resistor, a fourth resistor and a fifth resistor. A first connection end of the third resistor is connected to the detected operating power supply input port, a second connection end of the third resistor is connected to the comparator, a first connection end of the fourth resistor is connected to the second connection end of the third resistor, a second connection end of the fourth resistor is connected to a first connection end of the fifth resistor, and a second connection end of the fifth resistor is grounded.
[0011] Further, the isolation controller includes a sixth resistor, a seventh resistor and an optocoupler. A first connection end of the sixth resistor is connected to the comparator, a second connection end of the sixth resistor is connected to a first connection end of the seventh resistor, a first connection end of the seventh resistor is connected to the comparator, a second connection of the seventh resistor is connected to a first connection end of the optocoupler, a second connection end of the optocoupler is connected to the detected operating power supply input port, a third connection end of the optocoupler is grounded, a fourth connection end of the optocoupler is connected to the power amplifier power switch, and the power amplifier power input port is connected to the fourth connection end of the optocoupler.
[0012] Further, the first connection terminal of the power amplifier power switch is connected to the fourth connection terminal of the optocoupler, the second connection terminal of the power amplifier power switch is connected to the power amplifier power input port, and the third connection terminal of the power amplifier power switch is connected to the power amplifier power output port.
[0013] Further, the power filter uses a second capacitor.
[0014] Further, the comparator is provided with an OUT pin, a VCC pin, an INA- pin, an OUTB pin, an INA+ pin, an INB- pin, a VEE pin, and an INB+ pin. The OUT pin and the INA- pin are both connected to the detection working power input port. The INA+ pin and the VEE pin are both grounded. The VCC pin is connected to the first connection terminal of the sixth resistor. The OUTB pin is connected to the first connection terminal of the seventh resistor. The INB- pin is connected to the second connection terminal of the eighth resistor. The INB+ pin is connected to the second connection terminal of the first resistor.
[0015] Further, the power amplifier power switch includes a MOS transistor. The gate of the MOS transistor is connected to the fourth connection terminal of the optocoupler. The source of the MOS transistor is connected to the power amplifier power input pin. The drain of the MOS transistor is connected to the power amplifier power output pin.
[0016] Further, a diode is connected in parallel between the source and the drain of the MOS transistor.
[0017] Compared with the prior art, the present utility model has the following advantages and beneficial effects:
[0018] In the present utility model, the range of the negative voltage can be adjusted through the wide-range regulator to be applicable to the working conditions of various power amplifiers and multiple modes. At the same time, through the threshold setting regulator, the negative voltage threshold values of power-on and power-off can be modulated, and the timing control of power-on and power-off is more accurate. The comparator compares the negative voltage output by the wide-range regulator with the negative voltage threshold value of the threshold setting regulator, and outputs a control signal for the on or off timing to the isolator. The isolator isolates and converts the control signal and then controls the opening or closing of the power amplifier power switch, thereby completing the reliable control of the power amplifier power of the power amplifier power switch, achieving good consistency in the timing control of the negative power supply to go up first and then down, with fewer modulation parameters and high timing accuracy of control. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts. In the drawings:
[0020] Figure 1 It is a schematic diagram of the module of a timing controller for a negative voltage controlled power amplifier power supply in this embodiment;
[0021] Figure 2 It is a schematic diagram of the circuit structure of a timing controller for a negative voltage controlled power amplifier power supply in this embodiment.
[0022] Labels in the drawings and corresponding component names:
[0023] 1. Comparator; 2. Wide-range regulator; 3. Threshold setting regulator; 4. Isolation controller; 5. Power amplifier power supply switch; 6. Power supply filter. Specific implementation manners
[0024] The following makes an explanation of the exemplary embodiments of the present disclosure with reference to the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, and they should be considered merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope of the present disclosure. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted below.
[0025] In the present disclosure, unless otherwise specified, the use of terms such as "first", "second", etc. to describe various elements does not intend to limit the positional relationship, timing relationship or importance relationship of these elements. Such terms are only used to distinguish one element from another. In some examples, the first element and the second element may refer to the same instance of the element, and in certain cases, based on the description of the context, they may also refer to different instances.
[0026] In the description of various examples in the present disclosure, the terms used are only for the purpose of describing specific examples and are not intended to be restrictive. Unless the context clearly indicates otherwise, if the number of elements is not specifically limited, the element may be one or more. In addition, the term "and / or" used in the present disclosure covers any one of the listed items and all possible combinations.
[0027] Embodiment
[0028] A timing controller for a negative voltage controlled power amplifier power supply, comprising a comparator 1, a wide-range regulator 2, a threshold setting regulator 3, an isolation controller 4, and a power amplifier power supply switch 5; a first connection end of the wide-range regulator 2 is connected to a detected negative voltage input port VEE, a second connection end of the wide-range regulator 2 is connected to a first connection end of the comparator 1, and a third connection end of the wide-range regulator 2 is connected to a detected working power supply input port VCC1; a first connection end of the isolation controller 4 is connected to a second connection end of the comparator 1, and a second connection end of the isolation controller 4 is connected to a first connection end of the power amplifier power supply switch 5; an output end of the threshold setting modulator is connected to a third connection end of the comparator 1; a fourth connection end of the comparator 1 and a third connection end of the isolation controller 4 are both connected to the detected working power supply input port VCC1, a fourth connection end of the isolation controller 4 and a second connection end of the power amplifier power supply switch 5 are both connected to a power amplifier power supply input port VCC2, and a third connection end of the power amplifier power supply switch 5 is connected to a power amplifier power supply output port VCC2_OUT.
[0029] Specifically, in this embodiment, the wide-range regulator 2 can adjust the range of the negative voltage to be applicable to the working conditions of various power amplifiers and multiple modes. At the same time, through the threshold setting regulator 3, the negative voltage threshold values for power-on and power-off can be modulated, and the timing control of power-on and power-off is more accurate. The comparator 1 compares the negative voltage output by the wide-range regulator 2 with the negative voltage threshold value of the threshold setting regulator 3, and outputs a control signal for starting or shutting down the timing to the isolator. After the control signal is isolated and converted by the isolator, it controls the opening or closing of the power amplifier power supply switch 5, thereby completing the reliable control of the power amplifier power supply of the power amplifier power supply switch 5, achieving good consistency in the timing control of the negative power supply to be powered on first and then powered off, with fewer modulation parameters and high timing accuracy of control.
[0030] Further, it further includes a power supply filter 6, and the power supply filter 6 is arranged between the fourth connection end of the comparator 1 and the detected working power supply input port VCC1, and the power supply filter 6 uses a second capacitor C1.
[0031] It should be noted that, in this embodiment, the power supply filter 6 is used to filter the power supply supplied from the detected working power supply input port VCC1 to the comparator 1, ensuring the reliable operation of the comparator 1 and strong anti-interference ability.
[0032] Further, the wide-range regulator 2 includes a first resistor R11, a second resistor R12, and a first capacitor C2. The first connection end of the first resistor R11 is connected to the detection working power supply input port VCC1. The second connection end of the first resistor R11 is connected to the comparator 1. The first connection end of the first capacitor C2 is grounded, and the second connection end of the first capacitor C2 is connected to the second connection end of the first resistor R11. The first connection end of the second resistor R12 is connected to the detection negative voltage input port VEE, and the second connection end of the second resistor R12 is connected to the second connection end of the first capacitor C2.
[0033] Specifically, in this embodiment, the first capacitor C2 functions as a filter to avoid malfunction caused by power supply fluctuations. By adjusting and matching the resistance values of the two resistors, the adjustment range of the negative voltage can be changed, and adjustment can be performed within a wide range of VEE to 0V to adapt to the adjustment and use of various power amplifiers and different working modes of power amplifiers.
[0034] Further, the threshold setting regulator 3 includes a third resistor R8, a fourth resistor R9, and a fifth resistor R10. The first connection end of the third resistor R8 is connected to the detection working power supply input port VCC1. The second connection end of the third resistor R8 is connected to the comparator 1. The first connection end of the fourth resistor R9 is connected to the second connection end of the third resistor R8. The second connection end of the fourth resistor R9 is connected to the first connection end of the fifth resistor R10. The second connection end of the fifth resistor R10 is grounded.
[0035] Specifically, in this embodiment, by adjusting the resistance values of the three resistors in the threshold setting regulator 3, the threshold value is set. Then, the threshold value set by the comparator 1 is compared with the adjusted range value to accurately control the optocoupler U1 connected to the output of the comparator 1 to turn on or off reliably and accurately the power supply of the power amplifier, having the beneficial effect of strong consistency in timing control.
[0036] Further, the isolation controller 4 includes a sixth resistor R6, a seventh resistor R4, and an optocoupler U1. The first connection end of the sixth resistor R6 is connected to the comparator 1. The second connection end of the sixth resistor R6 is connected to the first connection end of the seventh resistor R4. The first connection end of the seventh resistor R4 is connected to the comparator 1. The second connection of the seventh resistor R4 is connected to the first connection end of the optocoupler U1. The second connection end of the optocoupler U1 is connected to the detection working power supply input port VCC1. The third connection end of the optocoupler U1 is grounded. The fourth connection end of the optocoupler U1 is connected to the power amplifier power switch 5. The power amplifier power input port VCC2 is connected to the fourth connection end of the optocoupler U1.
[0037] Specifically, in this embodiment, the sixth resistor R6 and the seventh resistor R4 are used to limit the current of the photodiode of the input optocoupler U1, so as to protect the optocoupler U1; through the optocoupler U1, it is convenient to isolate the control acquisition signal from the power amplifier current working control power supply, avoid affecting the control timing when the power amplifier current starts, and achieve the stability of timing control.
[0038] Further, the first connection end of the power amplifier power switch 5 is connected to the fourth connection end of the optocoupler U1, the second connection end of the power amplifier power switch 5 is connected to the power amplifier power input port VCC2, and the third connection end of the power amplifier power switch 5 is connected to the power amplifier power output port VCC2_OUT.
[0039] Further, the power amplifier power switch 5 includes a MOS transistor Q1. The gate of the MOS transistor Q1 is connected to the fourth connection end of the optocoupler U1. The source of the MOS transistor Q1 is connected to the power amplifier power input pin. The drain of the MOS transistor Q1 is connected to the power amplifier power output pin. A diode is connected in parallel between the source and the drain of the MOS transistor Q1.
[0040] It should be noted that, in this embodiment, the MOS transistor Q1 is specifically a metal-oxide-semiconductor field-effect transistor (MOSFET). The power amplifier power switch 5 further includes a zener diode Z1 and two voltage-dividing resistors (R1, R5). Through the zener diode Z1, it is convenient to protect the turn-on voltage drop of the MOSFEF and avoid excessive voltage drop and burning out the MOSFE, thereby improving reliability; through the two voltage-dividing resistors, it is convenient to divide the control voltage so that the divided voltage drop meets the turn-on or turn-off conditions of the MOSFET, and the MOSFET can be reliably turned on or off.
[0041] Specifically, in this embodiment, through the reliable turn-on or turn-off of the MOSFE, it is convenient to provide a reliable power supply path for the power amplifier; ensure that the power amplifier power supply reliably powers on negatively first and then powers off negatively according to the set timing, thereby improving precise timing control.
[0042] Further, the comparator 1 is provided with an OUT pin, a VCC pin, an INA- pin, an OUTB pin, an INA+ pin, an INB- pin, a VEE pin, and an INB+ pin. The OUT pin and the INA- pin are both connected to the detection working power input port VCC1. The INA+ pin and the VEE pin are both grounded. The VCC pin is connected to the first connection end of the sixth resistor R6. The OUTB pin is connected to the first connection end of the seventh resistor R4. The INB- pin is connected to the second connection end of the third resistor R8. The INB+ pin is connected to the second connection end of the first resistor R11.
[0043] Working principle: Refer to Figure 2, in the figure, R11 is the first resistor, R12 is the second resistor, C2 is the first capacitor, VCC1 is the detection working power supply input port, VEE is the detection negative voltage input port, N1 is the comparator, C1 is the second capacitor, R8 is the third resistor, R9 is the fourth resistor, R10 is the fifth resistor, R6 is the sixth resistor, R4 is the seventh resistor, U1 is the optocoupler, Q1 is the MOS transistor, Z1 is the zener diode, VCC2 is the power amplifier power supply input port, VCC2_OUT is the power amplifier power supply output port; the detection working power supply input port is connected to one end of the first resistor to supply power to the wide-range regulator, and then the detection negative voltage input port is connected to one end of the second resistor, and the negative voltage is input into the wide-range regulator for range adjustment based on different modes of the power amplifier, so as to be adjusted and matched through the first resistor and the second resistor and input into the comparator; the detection working power supply is connected to one end of the third resistor to supply power to the threshold setting regulator, and then the negative voltage threshold value is set based on the power amplifier requirements through the threshold setting regulator and input into the comparator; the comparator compares the negative voltage with the negative voltage threshold value and outputs a control signal for turning on or off the timing to the isolator; after the isolator isolates and converts the control signal, it outputs the control signal to the power amplifier power switch; the input end of the power amplifier power switch is connected to the power amplifier power supply input port, the output end of the power amplifier power switch is connected to the power amplifier power supply output port, and the control end of the power amplifier power switch is connected to the isolator to control the turning on or off of the power amplifier power switch, switch the power supply at the power amplifier power supply input port, and then after passing through the power amplifier power switch, it is output from the power amplifier power supply output port to the power amplifier source electrode to complete the reliable control of the power amplifier power supply timing.
[0044] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A timing controller for negative voltage controlled power amplifier power supply, characterized in that: The invention comprises a comparator, a wide range regulator, a threshold setting regulator, an isolation controller and a power amplifier power switch; the first connection end of the wide range regulator is connected to a detection negative voltage input port, the second connection end of the wide range regulator is connected to a first connection end of the comparator, and the third connection end of the wide range regulator is connected to a detection working power input port; the first connection end of the isolation controller is connected to a second connection end of the comparator, and the second connection end of the isolation controller is connected to a first connection end of the power amplifier power switch; the output end of the threshold setting modulator is connected to a third connection end of the comparator; the fourth connection end of the comparator and the third connection end of the isolation controller are both connected to the detection working power input port, the fourth connection end of the isolation controller and the second connection end of the power amplifier power switch are both connected to the power amplifier power input port, and the third connection end of the power amplifier power switch is connected to the power amplifier power output port.
2. A timing controller for negative voltage controlled power amplifier power supply according to claim 1, characterized in that: The device also includes a power supply filter, which is arranged between the fourth connection terminal of the comparator and the detection working power supply input port.
3. The timing controller for negative voltage controlled power amplifier power supply according to claim 1, characterized in that: The wide range regulator includes a first resistor, a second resistor and a first capacitor. The first connection end of the first resistor is connected to the detection working power input port, the second connection end of the first resistor is connected to the comparator, the first connection end of the first capacitor is signal-grounded, the second connection end of the first capacitor is connected to the second connection end of the first resistor, the first connection end of the second resistor is connected to the detection negative voltage input port, and the second connection end of the second resistor is connected to the second connection end of the first capacitor.
4. The timing controller for negative voltage controlled power amplifier power supply according to claim 3, characterized in that: The threshold setting regulator includes a third resistor, a fourth resistor and a fifth resistor. The first connection end of the third resistor is connected to the detection working power input port, the second connection end of the third resistor is connected to the comparator, the first connection end of the fourth resistor is connected to the second connection end of the third resistor, the second connection end of the fourth resistor is connected to the first connection end of the fifth resistor, and the second connection end of the fifth resistor is signal-grounded.
5. A timing controller for negative voltage controlled power amplifier power supply according to claim 4, characterized in that: The isolation controller includes a sixth resistor, a seventh resistor and a photoelectric coupler, the first connection end of the sixth resistor is connected to the comparator, the second connection end of the sixth resistor is connected to the first connection end of the seventh resistor, the first connection end of the seventh resistor is connected to the comparator, the second connection end of the seventh resistor is connected to the first connection end of the photoelectric coupler, the second connection end of the photoelectric coupler is connected to the detection working power input port, the third connection end of the photoelectric coupler is grounded, the fourth connection end of the photoelectric coupler is connected to the power switch of the power amplifier, and the power input port of the power amplifier is connected to the fourth connection end of the photoelectric coupler.
6. A timing controller for negative voltage controlled power amplifier power supply according to claim 5, characterized in that: The first connection end of the power amplifier power switch is connected to the fourth connection end of the photocoupler, the second connection end of the power amplifier power switch is connected to the power amplifier power input port, and the third connection end of the power amplifier power switch is connected to the power amplifier power output port.
7. The timing controller for negative voltage controlled power amplifier power supply according to claim 2, characterized in that: The power supply filter uses a second capacitor.
8. The timing controller for negative voltage controlled power amplifier power supply according to claim 5, characterized in that: The comparator is provided with an OUT pin, a VCC pin, an INA- pin, an OUTB pin, an INA+ pin, an INB- pin, a VEE pin and an INB+ pin, the OUT pin and the INA- pin are both connected to the detection working power input port, the INA+ pin and the VEE pin are both signal grounded, the VCC pin is connected to the first connection end of the sixth resistor, the OUTB pin is connected to the first connection end of the seventh resistor, the INB- pin is connected to the second connection end of the eighth resistor, and the INB+ pin is connected to the second connection end of the first resistor.
9. The timing controller for negative voltage controlled power amplifier power supply according to claim 6, characterized in that: The power switch of the power amplifier includes a MOS tube, the gate of the MOS tube is connected to the fourth connection end of the photoelectric coupler, the source of the MOS tube is connected to the power input pin of the power amplifier, and the drain of the MOS tube is connected to the power output pin of the power amplifier.
10. The timing controller for negative voltage controlled power amplifier power supply according to claim 9, characterized in that: A diode is connected in parallel between the source and drain of the MOS tube.