# US 11,444,604 B2 · Phase tracking pulse generation circuit and power supply device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,604 B2 - Document ID: US11444604B2 - Status: Granted - Kind: B2 - Application number: 17/266,681 - Filed: 2020-03-13 - Published: 2021-09-30 - Granted: 2022-09-13 - Earliest claimed: 2019-03-20 - Assignees: Shenzhen Tcl New Technology Co., Ltd. - Applicants: Shenzhen Tcl New Technology Co., Ltd. - Inventors: Dexiang Zuo; Guoliang Tang - Web page: https://patentgrep.com/patent/US11444604B2 ## CPC - H03K 3/012: Modifications of generator to improve response time or to decrease power consumption - H03K 5/24: the characteristic being amplitude - H03K 3/013: Modifications of generator to prevent operation by noise or interference - H03K 3/02: Generators characterised by the type of circuit or by the means used for producing pulses (H03K3/64 - H03K3/84 take precedence) - H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) ## Abstract Disclosed are a phase-tracked pulse generation circuit and a power supply device. The present application uses a driving pulse rising edge of a power supply as a reference, and uses a constant current circuit to charge a charging and discharging circuit at a constant current. When the reference driving pulse rising edge comes, the charging and discharging circuit is discharged; the peak voltage on the charging and discharging circuit is taken out and then divided for comparison with the voltage on the charging and discharging circuit; when the voltage on the charging and discharging circuit is equal to a divided voltage value of the peak voltage, the output of a comparison circuit turns high, and the output of a comparator is the phase-tracked pulse; the rising edge of the phase-tracked pulse can be used for synchronizing another power supply. ## Claims ### Claim 1 A phase tracking pulse generation circuit, comprising a constant current circuit, a peak voltage circuit, a pulse rising edge extraction circuit, a switch circuit, a charge and discharge circuit, and a comparison circuit; wherein the pulse rising edge extraction circuit is configured to receive a drive pulse output by a first power supply, the comparison circuit is configured to output a phase tracking pulse to a second power supply, the constant current circuit is connected to the peak voltage circuit and the charge and discharge circuit respectively, the pulse rising edge extraction circuit is connected to the switch circuit, the switch circuit is connected to the charge and discharge circuit and the comparison circuit respectively, and the charge and discharge circuit is connected to the comparison circuit; wherein, the constant current circuit is configured to generate a constant current, and charge the charge and discharge circuit; the pulse rising edge extraction circuit is configured to extract the drive pulse of the first power supply, and control on and off of the switch circuit according to the drive pulse; the switch circuit is configured to control the charge and discharge circuit to discharge when the switch circuit is turned on; the charge and discharge circuit is configured to provide a first voltage to the comparison circuit during charge or discharge; the peak voltage circuit is configured to extract a peak voltage of the charge and discharge circuit, adjust the peak voltage to obtain a second voltage, and output the second voltage to the comparison circuit; and the comparison circuit is configured to compare the first voltage with the second voltage and output the phase tracking pulse, wherein the peak voltage circuit comprises a peak sampling unit and a voltage regulation unit; the peak sampling unit is connected to the constant current circuit, the charge and discharge circuit, and the voltage regulation unit respectively, and the voltage regulation unit is connected to the comparison circuit. ### Claim 2 (depends on 1) The phase tracking pulse generation circuit of claim 1, wherein the peak sampling unit comprises a first comparator, a first resistor, a first diode and a first capacitor; wherein, a first voltage input terminal of the first comparator is connected to the constant current circuit and the charge and discharge circuit respectively, a second voltage input terminal of the first comparator is connected to a first terminal of the first capacitor and the voltage regulation unit respectively, an output terminal of the first comparator is connected to a first terminal of the first resistor and an anode of the first diode respectively, a power input terminal of the first comparator is connected to a power supply, and a ground terminal of the first comparator is grounded; a second terminal of the first resistor is connected to the power supply; a cathode of the first diode is connected to the second voltage input terminal of the first comparator, the first terminal of the first capacitor and the voltage regulation unit respectively; and a second terminal of the first capacitor is grounded. ### Claim 3 (depends on 2) The phase tracking pulse generation circuit of claim 2, wherein the voltage regulation unit comprises a second resistor and a third resistor; a first terminal of the second resistor is connected to the cathode of the first diode and the first terminal of the first capacitor respectively, a second terminal of the second resistor is connected to the comparison circuit, and the second terminal of the second resistor is further grounded through the third resistor. ### Claim 4 (depends on 3) The phase tracking pulse generation circuit of claim 3, wherein the constant current circuit comprises a first triode, a fourth resistor, a fifth resistor, and a second diode; wherein, a base of the first triode is grounded through the fourth resistor, the base of the first triode is further connected to an anode of the second diode, and an emitter of the first triode is connected to a first terminal of the fifth resistor, and a collector of the first triode is connected to the first voltage input terminal of the first comparator and the charge and discharge circuit respectively; a cathode of the second diode is connected to the power supply; and a second terminal of the fifth resistor is connected to the power supply. ### Claim 5 (depends on 4) The phase tracking pulse generation circuit of claim 4, wherein the second diode is a Zener diode. ### Claim 6 (depends on 4) The phase tracking pulse generation circuit of claim 4, wherein the charge and discharge circuit comprises a second capacitor; a first terminal of the second capacitor is connected to the comparison circuit, the collector of the first triode, the switch circuit and the first voltage input terminal of the first comparator respectively, and a second terminal of the second capacitor is grounded. ### Claim 7 (depends on 6) The phase tracking pulse generation circuit of claim 6, wherein the pulse rising edge extraction circuit comprises a third capacitor, a third diode, and a sixth resistor; a first terminal of the third capacitor is configured to receive the drive pulse output by the first power supply, a second terminal of the third capacitor is grounded through the third diode, the second terminal of the third capacitor is further grounded through the sixth resistor, and the second terminal of the third capacitor is further connected to the switch circuit. ### Claim 8 (depends on 7) The phase tracking pulse generation circuit of claim 7, wherein the switch circuit comprises a second triode; a gate of the second triode is connected to the second terminal of the third capacitor, a drain of the second triode is connected to the comparison circuit and the first terminal of the second capacitor respectively, and a source of the second triode is grounded. ### Claim 9 (depends on 8) The phase tracking pulse generation circuit of claim 8, wherein the comparison circuit comprises a second comparator and a seventh resistor; wherein, a first voltage input terminal of the second comparator is connected to the first terminal of the second capacitor, a second voltage input terminal of the second comparator is connected to a first terminal of the third resistor, a power input terminal of the second comparator is connected to the power supply, a ground terminal of the second comparator is grounded, and an output terminal of the second comparator is connected to a first terminal of the seventh resistor and the second power supply respectively; and a second terminal of the seventh resistor is connected to the power supply. ### Claim 10 A power supply device, comprising a phase tracking pulse generation circuit, wherein the phase tracking pulse generation circuit comprises a constant current circuit, a peak voltage circuit, a pulse rising edge extraction circuit, a switch circuit, a charge and discharge circuit, and a comparison circuit; the pulse rising edge extraction circuit is configured to receive a drive pulse output by a first power supply, the comparison circuit is configured to output a phase tracking pulse to a second power supply, the constant current circuit is connected to the peak voltage circuit and the charge and discharge circuit respectively, the pulse rising edge extraction circuit is connected to the switch circuit, the switch circuit is connected to the charge and discharge circuit and the comparison circuit respectively, and the charge and discharge circuit is connected to the comparison circuit; wherein, the constant current circuit is configured to generate a constant current, and charge the charge and discharge circuit; the pulse rising edge extraction circuit is configured to extract the drive pulse of the first power supply, and control on and off of the switch circuit according to the drive pulse; the switch circuit is configured to control the charge and discharge circuit to discharge when the switch circuit is turned on; the charge and discharge circuit is configured to provide a first voltage to the comparison circuit during charge or discharge; the peak voltage circuit is configured to extract a peak voltage of the charge and discharge circuit, adjust the peak voltage to obtain a second voltage, and output the second voltage to the comparison circuit; and the comparison circuit is configured to compare the first voltage with the second voltage and output the phase tracking pulse, wherein the peak voltage circuit comprises a peak sampling unit and a voltage regulation unit; the peak sampling unit is connected to the constant current circuit, the charge and discharge circuit, and the voltage regulation unit respectively, and the voltage regulation unit is connected to the comparison circuit. ### Claim 11 (depends on 10) The power supply device of claim 10, wherein the peak sampling unit comprises a first comparator, a first resistor, a first diode and a first capacitor; wherein, a first voltage input terminal of the first comparator is connected to the constant current circuit and the charge and discharge circuit respectively, a second voltage input terminal of the first comparator is connected to a first terminal of the first capacitor and the voltage regulation unit respectively, an output terminal of the first comparator is connected to a first terminal of the first resistor and an anode of the first diode respectively, a power input terminal of the first comparator is connected to a power supply, and a ground terminal of the first comparator is grounded; a second terminal of the first resistor is connected to the power supply; a cathode of the first diode is connected to the second voltage input terminal of the first comparator, the first terminal of the first capacitor and the voltage regulation unit respectively; and a second terminal of the first capacitor is grounded. ### Claim 12 (depends on 11) The power supply device of claim 11, wherein the voltage regulation unit comprises a second resistor and a third resistor; a first terminal of the second resistor is connected to the cathode of the first diode and the first terminal of the first capacitor respectively, a second terminal of the second resistor is connected to the comparison circuit, and the second terminal of the second resistor is further grounded through the third resistor. ### Claim 13 (depends on 12) The power supply device of claim 12, wherein the constant current circuit comprises a first triode, a fourth resistor, a fifth resistor, and a second diode; wherein, a base of the first triode is grounded through the fourth resistor, the base of the first triode is further connected to an anode of the second diode, and an emitter of the first triode is connected to a first terminal of the fifth resistor, and a collector of the first triode is connected to the first voltage input terminal of the first comparator and the charge and discharge circuit respectively; a cathode of the second diode is connected to the power supply; and a second terminal of the fifth resistor is connected to the power supply. ### Claim 14 (depends on 13) The power supply device of claim 13, wherein the second diode is a Zener diode. ### Claim 15 (depends on 13) The power supply device of claim 13, wherein the charge and discharge circuit comprises a second capacitor; a first terminal of the second capacitor is connected to the comparison circuit, the collector of the first triode, the switch circuit and the first voltage input terminal of the first comparator respectively, and a second terminal of the second capacitor is grounded. ### Claim 16 (depends on 15) The power supply device of claim 15, wherein the pulse rising edge extraction circuit comprises a third capacitor, a third diode, and a sixth resistor; a first terminal of the third capacitor is configured to receive the drive pulse output by the first power supply, a second terminal of the third capacitor is grounded through the third diode, the second terminal of the third capacitor is further grounded through the sixth resistor, and the second terminal of the third capacitor is further connected to the switch circuit. ### Claim 17 (depends on 16) The power supply device of claim 16, wherein the switch circuit comprises a second triode; a gate of the second triode is connected to the second terminal of the third capacitor, a drain of the second triode is connected to the comparison circuit and the first terminal of the second capacitor respectively, and a source of the second triode is grounded. ### Claim 18 (depends on 17) The power supply device of claim 17, wherein the comparison circuit comprises a second comparator and a seventh resistor; wherein, a first voltage input terminal of the second comparator is connected to the first terminal of the second capacitor, a second voltage input terminal of the second comparator is connected to a first terminal of the third resistor, a power input terminal of the second comparator is connected to the power supply, a ground terminal of the second comparator is grounded, and an output terminal of the second comparator is connected to a first terminal of the seventh resistor and the second power supply respectively; and a second terminal of the seventh resistor is connected to the power supply.