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公开(公告)号：US11609249B2
公开(公告)日：2023-03-21
申请号：US17138785
申请日：2020-12-30
发明人： Tien-Yun Peng , Hsien-Huang Tsai , Chih-Sheng Chen
摘要： A voltage state detector includes an input terminal, a voltage drop circuit, a pull-down circuit, a load circuit, a transistor, a pull-up circuit, a first output terminal, and a second output terminal. The voltage drop circuit is coupled to the input terminal. The pull-down circuit is coupled to the voltage drop circuit and a first reference terminal. The load circuit is coupled to a second reference terminal. The transistor has a first terminal coupled to the load circuit, a second terminal coupled to the first reference terminal, and a control terminal coupled to the voltage drop circuit. The pull-up circuit is coupled to the second reference terminal and the voltage drop circuit. The first output terminal is coupled to the first terminal of the transistor for outputting a first state determination signal. The second output terminal is coupled to the voltage drop circuit for outputting a second state determination signal.
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公开(公告)号：US20230047897A1
公开(公告)日：2023-02-16
申请号：US17975591
申请日：2022-10-27
发明人： Tse-Peng Chen
IPC分类号： G01S13/04 , F21V23/04 , G01S13/56 , H05B47/19 , H05B47/115
摘要： An occupancy detection apparatus has a switch, a first antenna, a second antenna, a transmitter, and a motion detection circuit. The occupancy detection apparatus monitors for a first motion in a first region using the first antenna using a first motion detection parameter. When no first motion is sensed by the monitoring using the first antenna, the occupancy detection apparatus monitors for a second motion in a second region using the second antenna using a second motion detection parameter. When no second motion is sensed by monitoring using the second antenna, the occupancy detection apparatus designates a space, which encompasses the second region, as unoccupied. The first region and the second region overlap one another, and the first motion detection parameter is different from the second motion detection parameter.
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公开(公告)号：US11450656B2
公开(公告)日：2022-09-20
申请号：US16522677
申请日：2019-07-26
发明人： Chuan-Chen Chao
摘要： An anti-parallel diode device includes a first semiconductor, a second semiconductor, a third semiconductor, and a third diode. The first semiconductor is of a first conductivity type, and the second semiconductor and the third semiconductor are of a second conductivity type. The second semiconductor is in contact with the first semiconductor, so that the first semiconductor and the second semiconductor form a first diode. The third semiconductor is in contact with the first semiconductor, so that the first semiconductor and the third semiconductor form a second diode. A first terminal of the third diode is electrically connected to the first semiconductor. The first terminal of the third diode is of the second conductivity type.
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公开(公告)号：US11362870B2
公开(公告)日：2022-06-14
申请号：US17115805
申请日：2020-12-09
发明人： Ching Shou Huang
IPC分类号： H04L27/152 , H03L7/099 , H04L7/033 , H03L7/093
摘要： A frequency modulation demodulation device and a control method thereof are provided. The frequency modulation demodulation device includes an input terminal, a phase converter, a phase-locked loop circuit, and a frequency offset/shift detector. The phase converter receives an input signal to obtain a phase signal. The phase-locked loop circuit generates a phase adjustment signal according to the phase signal and adjusts the phase signal according to the phase adjustment signal to perform demodulation of the input signal. The phase-locked loop circuit performs signal alignment and signal compensation on the phase signal to generate a filtered phase signal. The phase adjustment signal provides a feedback of and adjusts the phase signal. The frequency offset/shift detector generates a frequency offset/shift determining signal according to the phase adjustment signal. The frequency offset/shift determining signal is related to a phase frequency offset/shift of the input signal.
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公开(公告)号：US20220173707A1
公开(公告)日：2022-06-02
申请号：US17535701
申请日：2021-11-26
发明人： Tien-Yun Peng , Chih-Sheng Chen
摘要： A bias circuit includes a current mirror circuit, an operational amplifier, and a bias generating circuit. The current mirror circuit includes a reference branch circuit and at least one mirror branch circuit. The reference branch circuit generates a reference current according to a base current, and the at least one mirror branch circuit generates at least one mirrored current according to the reference current. The operational amplifier receives a first voltage from the reference branch circuit and a second voltage from the at least one mirror branch circuit, and adjusts the first voltage by generating a control voltage according to the second voltage. The bias generating circuit is coupled to the at least one mirror branch circuit and generates a bias signal according to the at least one mirrored current.
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公开(公告)号：US11307287B2
公开(公告)日：2022-04-19
申请号：US16663328
申请日：2019-10-24
发明人： Chiang-Hua Yeh , Hsiang-Feng Chi
摘要： A radar apparatus and a leakage correction method thereof are provided. The radar apparatus includes a transmitter and a receiver. The transmitter includes a sinewave signal generator. The sinewave signal generator generates a sinewave signal. The receiver includes another sinewave signal generator and a correcting circuit. The receiver receives transmitting signals including the sinewave signal from the transmitter. The sinewave signal generator of the receiver generates another sinewave signal according to the amplitude of the transmitting signals or received transmitting signals. The correcting circuit corrects leakage situation on the received transmitting signals according to another sinewave signal. The phasor of sinewave form corresponding to the leakage situation relates to the phasor of another sinewave signal. Accordingly, the performance of receiver may be improved effectively.
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公开(公告)号：US11303256B2
公开(公告)日：2022-04-12
申请号：US17086472
申请日：2020-11-02
发明人： Hwey-Ching Chien
摘要： A temperature compensation circuit for a power amplifier is provided, wherein data of circuit configurations corresponding to specific temperatures (including data associated with an output terminal voltage, a bias voltage, an adaptive bias, and a matching impedance of the power amplifier) for the power amplifier is stored in a read-only memory. Therefore, the temperature compensation circuit is capable of reading the data according to a temperature sensing signal to adjust the circuit configuration of the power amplifier accordingly, thereby, in a case of a constant input power of the power amplifier, an output power variance of the power amplifier is within a second interval (e.g., −10%˜+10%) when an environment temperature varies within a first interval. Therefore, the power amplifier has a stable gain.
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公开(公告)号：US11258445B2
公开(公告)日：2022-02-22
申请号：US17010838
申请日：2020-09-03
发明人： Hsien-Huang Tsai , Chih-Sheng Chen
IPC分类号： H03K17/687 , H03K17/10 , H03K19/0185 , G05F1/62 , H03K17/06 , G05F1/585 , G05F1/66
摘要： A radio frequency apparatus and a voltage generating device thereof are provided. The voltage generating device includes a first switch and a second switch. A first terminal of the first switch receives a first voltage. A control terminal of the first switch receives a second voltage. A first terminal of the second switch receives the second voltage. A control terminal of the second switch receives the first voltage. A second terminal of the second switch and a second terminal of the first switch are coupled to an output node, wherein the output node outputs an output voltage related to at least one of the first voltage and the second voltage.
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公开(公告)号：US11228308B2
公开(公告)日：2022-01-18
申请号：US16993218
申请日：2020-08-13
发明人： Chih-Sheng Chen , Tsung-Han Lee
摘要： A switching circuit includes a first transmission terminal, a second transmission terminal, a third transmission terminal, and a variable impedance circuit. The first and the second transmission terminals coupled to a common node form a first transmission path. The third transmission terminal coupled to the common node forms a second transmission path with the first transmission terminal. The variable impedance circuit has a first terminal coupled between the common node and the third transmission terminal, and a second terminal coupled to a first reference potential terminal. When the first transmission path transmits a first signal, a first frequency bandwidth range provided by the variable impedance circuit is determined according to a first frequency of the first signal so that the variable impedance circuit provides low impedance in the first frequency bandwidth range, and the first frequency bandwidth range covers the first frequency.
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公开(公告)号：US20210359646A1
公开(公告)日：2021-11-18
申请号：US17229809
申请日：2021-04-13
发明人： Pin-Yi Huang , Chih-Sheng Chen , Ching-Wen Hsu
摘要： An amplifier circuit includes an input terminal used to receive an input signal, an output terminal used to output an output signal, an amplification unit, and a phase adjustment unit. The amplification unit includes an input terminal coupled to the input terminal of the amplifier circuit, an output terminal coupled to the output terminal of the amplifier circuit, a first terminal coupled to a first voltage terminal, and a second terminal coupled to a second voltage terminal. The phase adjustment unit is coupled to the amplification unit. When the amplifier circuit is operated in a first mode, the output signal has a first phase, and when the amplifier circuit is operated in a second mode, the output signal has a second phase. A difference between the first phase and the second phase is within a predetermined range.
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