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公开(公告)号：US11323082B2
公开(公告)日：2022-05-03
申请号：US16988727
申请日：2020-08-10
Inventor： Yang-Jing Huang , Shao-Ming Sun , Jhe-Jia Jhang
Abstract: A class-D amplifier configured to adjust at least one input signal to at least one output signal. The class-D amplifier comprises: a loop filter, configured to receive the input signal; a PWM circuit, configured to generate at least one PWM signal; a summing circuit, coupled between an output of the loop filter and an input of the PWM circuit; an output circuit operating at a supply voltage, configured to generate the output signal responding to the PWM signal; and a supply voltage filter, configured to monitor the supply voltage to generate a filtered signal to the summing circuit. The summing circuit is configured to sum the output of the loop filter and the filtered signal to adjust a common-mode level of the input of the PWM circuit.
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公开(公告)号：US11100963B1
公开(公告)日：2021-08-24
申请号：US16935206
申请日：2020-07-22
Inventor： Po-Hsun Wu , Jen-Shou Hsu
Abstract: A data first-in first-out (FIFO) circuit includes a register unit, a plurality of data multiplexers, and an output multiplexer. The register unit includes a plurality of decoders and a plurality of N registers. The decoders are used for outputting a plurality of decoded signals in response to a plurality of corresponding input control signals and at least one input enabling signal. The N registers are configured to receive input data in response to the corresponding decoded signals from the corresponding decoders. The data multiplexers each are coupled to M ones of the registers, wherein N and M are positive integers, N is equal to or greater than four, M is equal to or greater than two, and N is greater than M. The output multiplexer, coupled to the data multiplexers, is used for providing a corresponding output from the data multiplexers sequentially.
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63.发明授权公开(公告)号：US12184246B2
公开(公告)日：2024-12-31
申请号：US17568732
申请日：2022-01-05
Inventor： Che-Wei Hsu , Wun-Long Yu
Abstract: A driving circuit of a loudspeaker includes a periodic signal generation circuit, a signal processing circuit, a class-D amplifier circuit, a current sensing circuit, and a sample and hold circuit. The periodic signal generation circuit is arranged to generate a periodic signal and a control signal. The signal processing circuit is coupled to the periodic signal generation circuit, and is arranged to generate a pre-driving signal. The class-D amplifier circuit is coupled to the signal processing circuit, and is arranged to drive the loudspeaker according to the pre-driving signal. The current sensing circuit is coupled to the class-D amplifier circuit, and is arranged to generate a current sensing signal. The sample and hold circuit is coupled to the periodic signal generation circuit and the current sensing circuit, and is arranged to sample and hold the current sensing signal according to the control signal, to generate a current sampling signal.
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公开(公告)号：US12166372B2
公开(公告)日：2024-12-10
申请号：US17561685
申请日：2021-12-23
Inventor： Yao-Wei Yang
IPC: H02J7/00
Abstract: A linear charger includes a constant current charging circuit and a thermal regulation circuit. The constant current charging circuit is arranged to generate a charging current, and includes a first transconductance amplifier, wherein the first transconductance amplifier has a positive terminal, a negative terminal, and an output terminal. The thermal regulation circuit is coupled to the output terminal and the negative terminal of the first transconductance amplifier, and is arranged to generate and modulate a thermal regulation current and an amplifier reference voltage with temperature, and transmit the thermal regulation current and the amplifier reference voltage to the output terminal and the negative terminal of the first transconductance amplifier, respectively.
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公开(公告)号：US20240333264A1
公开(公告)日：2024-10-03
申请号：US18507118
申请日：2023-11-13
Inventor： DAR-CHANG JUANG , HUNG-JUI TING
IPC: H03K3/013 , H03K3/0233 , H03K19/0185
CPC classification number: H03K3/013 , H03K3/02337 , H03K19/018514
Abstract: A photoelectric sensing device for cancelling crosstalk includes a first capacitor; a first switch, coupled between a current source and the first capacitor, is turned on according to a driving signal, and enables the current source to charge the first capacitor to generate a first capacitor voltage; a second switch, coupled between the first capacitor and an input terminal, is turned on according to a cancellation signal; a current-voltage conversion circuit, coupled to the second switch, receiving an input current corresponding to a crosstalk signal, and generating a crosstalk voltage corresponding to the input current. Wherein, when the second switch is turned on, the crosstalk voltage is subtracted from the first capacitor voltage to cancellate the crosstalk signal, so as to output a correct sensing voltage.
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Patent Agency Ranking
公开(公告)号：US12092672B2
公开(公告)日：2024-09-17
申请号：US17964847
申请日：2022-10-12
Inventor： Yi-Chou Huang
CPC classification number: G01R27/2605 , H03F3/45475 , H03M3/30 , H03F2200/213 , H03F2200/271 , H03F2203/45156
Abstract: A capacitance measure circuit includes a charge to voltage converter (CVC), and the CVC includes an excitation signal generation circuit that is arranged to generate and connect an excitation signal to a first terminal of a capacitance sensor, a differential amplifier, a first switch circuit, and at least one first variable capacitor. The inverting input terminal of the differential amplifier is arranged to receive a sensing capacitance value from a second terminal of the capacitance sensor. The first switch circuit is coupled between the inverting input terminal and the non-inverting output terminal of the differential amplifier, and is connected in parallel with the at least one first variable capacitor at the inverting input terminal and the non-inverting output terminal of the differential amplifier.
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公开(公告)号：US12088267B2
公开(公告)日：2024-09-10
申请号：US17585606
申请日：2022-01-27
Inventor： Che-Wei Hsu , Wun-Long Yu
CPC classification number: H03G3/3015 , H02M3/1582 , H03F3/2178 , H03F2200/351
Abstract: An audio amplifier with duty ratio control is provided. The audio amplifier comprises a pulse width modulation modulator, a power stage, and a voltage converter. The pulse width modulation modulator is configured to receive an input signal for generating a pulse width modulation signal. The power stage is configured to output an output signal according to a supply voltage and the pulse width modulation signal. The voltage converter is configured to adjust voltage level of the supply voltage according to the pulse width modulation signal. The audio amplifier is configured to adjust the voltage level of the supply voltage when duty ratio of the pulse width modulation signal is greater than a duty ratio threshold.
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公开(公告)号：US11942950B2
公开(公告)日：2024-03-26
申请号：US17847225
申请日：2022-06-23
Inventor： Shu-Han Nien
CPC classification number: H03K5/135 , H03K5/2418 , H03K5/2427 , H03K2005/00176
Abstract: An input clock buffer, comprising: a first capacitor; a second capacitor; a first amplifier, configured to generate a first output signal, comprising input terminals coupled to the first capacitor and the second capacitor, wherein the first capacitor and the second capacitor receives a differential input signal; a second amplifier, configured to generate a second output signal according to the differential input signal; a frequency detection circuit, configured to generate a frequency detection signal according to a frequency of the differential input signal; and a switch, located between an output of the first amplifier and an output of the second amplifier, configured to turn on and turn off according to the frequency detection signal.
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公开(公告)号：US11892521B2
公开(公告)日：2024-02-06
申请号：US17406121
申请日：2021-08-19
Inventor： Tse-Hua Yao
IPC: G01R31/68 , G01R1/067 , H01L23/525
CPC classification number: G01R31/68 , G01R1/06794 , H01L23/5256
Abstract: A semiconductor device with contact check circuitry is provided. The semiconductor device includes a plurality of pads, an internal circuit, and a contact check circuit. The plurality of pads includes a first pad and a second pad. The internal circuit is coupled to the plurality of pads. The contact check circuit, at least coupled to the first pad and the second pad, is used for checking, when the semiconductor device is under test, contact connections to the first pad and the second pad to generate a check result signal according to comparison of a first test signal and a second test signal received from the first pad and the second pad with at least one reference signal.
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公开(公告)号：US20240030799A1
公开(公告)日：2024-01-25
申请号：US17872024
申请日：2022-07-25
Inventor： YAO-WEI YANG
CPC classification number: H02M1/0009 , H02M3/156
Abstract: A control circuit for controlling a DC-DC converter is provided. The control circuit comprises a first sensor, second sensor, error amplifier, signal conditioning circuit, first comparison circuit, second comparison circuit, and driver circuit. The error amplifier is configured to receive a feedback voltage and a reference voltage for generating a first voltage. The signal conditioning circuit is configured to receive the first voltage for generating a second voltage and a third voltage. The first comparison circuit is configured to make a comparison based on a first sensing signal from the first sensor and the second voltage for generating a first comparison signal. The second comparison circuit is configured to make a comparison based on a second sensing signal from the second sensor and the third voltage for generating a second comparison signal. The driver circuit is for driving a power stage according to the first and second comparison signals.
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