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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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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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Patent Agency Ranking
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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公开(公告)号：US11770080B1
公开(公告)日：2023-09-26
申请号：US17844692
申请日：2022-06-20
Inventor： Ming-Fu Tsai
Abstract: A method for increasing a resolution by N bits performed by a processing circuit of a motor driving system, where N is a positive integer, and the method includes: performing a conversion upon an analog command, to generate a command count value; performing a first N-bit right-shifting operation upon the command count value, to generate an initial output value; performing a logical operation upon the command count value, to generate a low bit value; generating an overflow value according to the low bit value; and determining a final output value according to the initial output value and the overflow value.
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38.发明授权公开(公告)号：US11601753B2
公开(公告)日：2023-03-07
申请号：US17344907
申请日：2021-06-10
Inventor： Hsin-Yuan Chiu , Tsung-Fu Lin
Abstract: A parametric equalizer includes an equalizer circuit, a first protection circuit, a second protection circuit, and a first addition circuit. The equalizer circuit is arranged to receive an input signal, and process the input signal to generate an output signal. The first protection circuit is arranged to generate a first protection signal according to the output signal, the input signal, and a first processed signal. The second protection circuit is arranged to generate a second protection signal according to the input signal and a second processed signal. The first addition circuit is coupled to the first protection circuit and the second protection circuit, and is arranged to combine the first protection signal and the second protection signal to generate an equalizer output signal.
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39.发明授权公开(公告)号：US11570563B1
公开(公告)日：2023-01-31
申请号：US17382393
申请日：2021-07-22
Inventor： Jung-Kuei Chang , Wun-Long Yu
IPC: H04R29/00 , H04B17/309
Abstract: A loudspeaker controller for estimating a fundamental resonance frequency of a loudspeaker includes: an amplifier circuit, arranged to generate a driving signal of the loudspeaker according to an audio input signal; a sensing circuit, arranged to sense characteristics of the driving signal to generate a measurement signal; a plurality of band pass filter circuits, arranged to filter the measurement signal to generate a plurality of filter outputs, respectively, wherein the plurality of band pass filter circuits have different passbands; and an estimation circuit, arranged to estimate the fundamental resonance frequency according to the plurality of filter outputs.
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公开(公告)号：US11489499B1
公开(公告)日：2022-11-01
申请号：US17396853
申请日：2021-08-09
Inventor： Tsung-Fu Lin , Hsin-Yuan Chiu
Abstract: A switch circuit provides a first output signal and a second output signal for switching between ternary modulation and quaternary modulation for a target device. A first output signal is provided from one of a first signal, a second signal and a ground signal according to an input signal and a duty signal, wherein the first signal is generated through performing a one-bit left-shift operation for the input signal, and the second signal is generated through adding the input signal and the duty signal. A second output signal is provided from one of a third signal, a fourth signal and the ground signal according to the input signal and the duty signal, wherein the third signal is generated through subtracting the input signal from the duty signal, and the fourth signal is generated through performing a two's-complement transformation and the one-bit left-shift operation for the input signal.
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