峰均比抑制电路及电子设备
By combining the DC-DC conversion of the peak-to-average power ratio suppression circuit with the energy storage circuit, the problem of low power utilization in PoE power supply products is solved, achieving dual suppression of voltage and current, improving power utilization and sound quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TP-LINK
- Filing Date
- 2025-07-11
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, PoE-powered products suffer from large dynamic load variations, which means that power design can only be based on peak values. This results in low power utilization and complex software algorithms that process waveforms, affecting sound quality.
A peak-to-average power ratio (PAPR) suppression circuit is adopted, which includes a DC-DC conversion circuit, an energy storage circuit, and a sampling circuit. The DC voltage and current are adjusted by sampling signals, and the energy storage circuit provides alternative current to achieve dual suppression of voltage and current.
It improves the peak-to-average power ratio, enhances power utilization, simplifies circuit design, and improves sound quality.
Smart Images
Figure CN224520661U_ABST
Abstract
Claims
1. A peak-to-average ratio suppression circuit, characterized by, include: A DC-DC converter circuit is used to receive an input DC power and convert the input DC power into a first DC power. An energy storage circuit, connected to the DC-DC conversion circuit, is used to receive the first DC power for charging and to output power supply DC power. A sampling circuit, connected to the energy storage circuit and the DC-DC conversion circuit, is used to sample the current of the supplied DC power supply to output a sampling signal; The DC-DC conversion circuit is also used to convert the input DC power into the first DC power based on the sampled signal.
2. The peak-to-average ratio suppression circuit according to claim 1, wherein Also includes: A power amplifier circuit, connected to the sampling circuit, is used to receive an audio signal and amplify the audio signal when powered by the DC power supply to output an amplified audio signal, which is then used by the speaker to play the audio signal.
3. The peak-to-average ratio suppression circuit of Claim 1, wherein Connect to the PoE power supply circuit; The POE power supply circuit is used to provide the input DC power.
4. The peak-to-average ratio suppression circuit of Claim 1, wherein, Also includes: A filter circuit, connected to the DC-DC conversion circuit and the energy storage circuit, is used to filter the first DC power. The energy storage circuit is specifically used to connect to the filtered first DC power for charging, and to output the supply DC power.
5. The peak-to-average ratio suppression circuit of Claim 4 wherein, The filter circuit includes a Zener diode, a first capacitor, and a first resistor; The negative terminal of the Zener diode and the first end of the first resistor are connected and together form the input and output terminals of the filter circuit, which are connected to the DC-DC converter circuit, the energy storage circuit and the sampling circuit to receive the first DC power and output the filtered first DC power. The second end of the first resistor is connected to the first end of the first capacitor; The second terminal of the first capacitor and the positive terminal of the Zener diode are both connected to the power supply ground.
6. The peak-to-average power ratio (PAPR) suppression circuit as described in claim 1, characterized in that, The sampling circuit includes: A sampling resistor assembly, connected to the energy storage circuit, is used to detect the current of the supplied DC power and output a two-terminal detection signal. A signal conversion circuit, connected to the DC-DC conversion circuit, the energy storage circuit, and the sampling resistor assembly, is used to convert a two-ended detection signal into a single-ended detection voltage. The voltage divider circuit, connected to the signal conversion circuit and the DC-DC conversion circuit, is used to divide the detection voltage to output a sampling signal.
7. The peak-to-average ratio suppression circuit of Claim 6 wherein, The signal conversion circuit includes a current detection amplifier; The power supply terminal of the current sensing amplifier is connected to the first power supply; The positive and negative input terminals of the current sensing amplifier together constitute the input terminal of the signal conversion circuit, which is connected to the DC-DC conversion circuit, the energy storage circuit, and the sampling resistor assembly to receive the detection signal. The output terminal of the current detection amplifier forms the output terminal of the signal conversion circuit and is connected to the voltage divider circuit to output the detection voltage; The reference voltage terminal and the ground terminal of the current sensing amplifier are both connected to the power supply ground.
8. The peak-to-average ratio suppression circuit of Claim 6, wherein, The voltage divider circuit includes a second capacitor, a second resistor, a third resistor, and a fourth resistor; The first end of the third resistor and the first end of the second capacitor are connected and together form the power supply terminal of the voltage divider circuit, which is connected to the DC-DC conversion circuit, the energy storage circuit and the sampling circuit to be connected to the DC power supply. The first end of the second resistor forms the input terminal of the voltage divider circuit and is connected to the signal conversion circuit to receive the detection voltage; The second end of the third resistor, the second end of the second capacitor, the second end of the second resistor, and the first end of the fourth resistor are connected and together form the output terminal of the voltage divider circuit, which is connected to the DC-DC conversion circuit to output the sampling signal; The second terminal of the fourth resistor is connected to the power supply ground.
9. The peak-to-average ratio suppression circuit according to any one of claims 1 to 8, wherein The DC-DC conversion circuit includes a DC-DC converter and a third capacitor; The input terminal of the DC-DC converter constitutes the input DC power input terminal of the DC-DC conversion circuit, so as to connect the input DC power; The bootstrap capacitor terminal of the DC-DC converter is connected to the first terminal of the third capacitor. The second terminal of the third capacitor is connected to the switching terminal of the DC converter and together they form the output terminal of the DC conversion circuit, which is connected to the energy storage circuit and the sampling circuit to output the first DC power. The feedback terminal of the DC-DC converter constitutes the sampling signal input terminal of the DC-DC conversion circuit and is connected to the sampling circuit to receive the sampling signal.
10. An electronic device, characterized in that, The electronic device includes a peak-to-average power ratio (PAPR) suppression circuit as described in any one of claims 1 to 9.