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公开(公告)号：US20220003837A1
公开(公告)日：2022-01-06
申请号：US17332995
申请日：2021-05-27
Applicant: RichWave Technology Corp.
Inventor： Wei-Min Liu , Po-Fu Wan , Han-Jieh Chang , Hsiang-Feng Chi
Abstract: An object recognition method includes generating Doppler spectrogram data according to an echo signal, the echo signal being relating to an object; transforming N sets of time-domain data of the Doppler spectrogram data corresponding to N velocities into N sets of cadence spectrogram data, respectively; combining the N sets of spectrogram data to obtain 1D/2D cadence spectrum data, and acquiring a series of cadence feature from the 1D/2D cadence spectrum data to recognize the object.
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公开(公告)号：US11199864B1
公开(公告)日：2021-12-14
申请号：US17138855
申请日：2020-12-30
Applicant: RichWave Technology Corp.
Inventor： Chia-Jung Yeh , Tien-Yun Peng , Chih-Sheng Chen
Abstract: A voltage controlled circuit includes a tracking circuit, an operational amplifier, a transistor, a feedback circuit and a sample and hold circuit. The tracking circuit generates an updated enabling voltage according to an enabling voltage, a sample enabling voltage and a sample reference voltage. The operational amplifier includes a first input terminal used to receive an input voltage, a second input terminal used to receive a feedback voltage, and an output terminal used to output a control voltage. The transistor includes a control terminal used to receive the control voltage, a first terminal used to receive a reference voltage, and a second terminal used to output a regulated voltage. The feedback circuit generates the feedback voltage according to the regulated voltage. The sample and hold circuit is used to sample the input voltage to generate the sample enabling voltage, and sample the feedback voltage to generate the sample reference voltage.
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公开(公告)号：US20210376823A1
公开(公告)日：2021-12-02
申请号：US16993218
申请日：2020-08-13
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Tsung-Han Lee
Abstract: 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：US11108366B2
公开(公告)日：2021-08-31
申请号：US16509450
申请日：2019-07-11
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Ching-Wen Hsu
Abstract: An amplifier circuit includes an output terminal, an amplification unit and a switch. The output terminal is used to output an amplification signal. The amplification unit includes a first transistor and a second transistor. The first transistor includes a control terminal for receiving a first input signal, a first terminal coupled to the output terminal for outputting an amplified first input signal, and a second terminal. The second transistor includes a control terminal for receiving a second input signal, a first terminal coupled to the output terminal for outputting an amplified second input signal, and a second terminal. The switch includes a first terminal coupled to the second terminal of the first transistor, and a second terminal. The amplification signal is generated using at least the amplified first input signal and/or the amplified second input signal.
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公开(公告)号：US20210231789A1
公开(公告)日：2021-07-29
申请号：US17228722
申请日：2021-04-13
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
IPC: G01S13/524
Abstract: The Doppler signal processing device includes a frequency analyzer, an interference suppressor, an interference baseline estimator and a synthesizer. The frequency analyzer can generate a frequency domain signal according to a digital signal. The interference suppressor can perform a suppression operation to generate an interference suppressed frequency domain signal. The interference baseline estimator can generate or update the frequency domain interference estimation signal according to the frequency domain signal. The synthesizer can generate an interference suppressed digital signal according to the interference suppressed frequency domain signal, where the interference suppressed digital signal is related to the digital signal with the interference energy suppressed.
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Patent Agency Ranking
公开(公告)号：US11069806B2
公开(公告)日：2021-07-20
申请号：US16823337
申请日：2020-03-19
Applicant: RichWave Technology Corp.
Inventor： Chuan-Chen Chao , Shyh-Chyi Wong , Shu-Yuan Hsu
IPC: H01L29/78 , H01L29/08 , H01L27/06 , H01L29/10 , H01L21/8234 , H01L27/088 , H03F3/213
Abstract: An integrated circuit includes a logic circuit and an amplifying circuit, in particular a low-noise amplifying circuit. The amplifying circuit includes at least one first transistor. The gate of the first transistor is coupled to a signal input terminal, the source region and the drain region of the first transistor are formed respectively in the well region of the first transistor on both sides of the gate, wherein the source region is coupled to a reference voltage terminal, and the sheet resistance of the source region is lower than that of the drain region. The logic circuit includes at least one second transistor. The sheet resistances of the source region and the drain region of the second transistor are equal.
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公开(公告)号：US10992268B2
公开(公告)日：2021-04-27
申请号：US16571182
申请日：2019-09-15
Applicant: RichWave Technology Corp.
Inventor： Shyh-Chyi Wong , Cheng-Min Lin
Abstract: A radio frequency signal amplification device includes an amplification circuit, an impedance matching circuit, a frequency detection circuit, and a control circuit. The amplification circuit has an input terminal and an output terminal. The amplification circuit amplifies a radio frequency (RF) signal received from the input terminal, and generates an amplified radio frequency signal to the output terminal. The impedance matching circuit is coupled to the input terminal or the output terminal of the amplification circuit. The impedance matching circuit receives the radio frequency signal and provides an impedance matching the radio frequency signal, or receives the amplified radio frequency signal and provides an impedance matching the amplified radio frequency signal. The frequency detection circuit determines a frequency band to which the radio frequency signal belongs. The control circuit adjusts the impedance of the impedance matching circuit according to the frequency band.
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公开(公告)号：US20210119628A1
公开(公告)日：2021-04-22
申请号：US17010838
申请日：2020-09-03
Applicant: RichWave Technology Corp.
Inventor： Hsien-Huang Tsai , Chih-Sheng Chen
IPC: H03K17/687
Abstract: 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：US10948581B2
公开(公告)日：2021-03-16
申请号：US15993585
申请日：2018-05-30
Applicant: Richwave Technology Corp.
Inventor： Sheng Chung Kuo
Abstract: Methods and apparatus for detecting presence of an object in an environment, the method including receiving a Doppler signal during a frame in frequency domain, separating the Doppler signal in the frequency domain into a plurality of sub-band signals, determining a plurality of sub-band signal energies corresponding to the plurality of sub-band signals, determining whether motion of the object is detected in accordance with one of the plurality of sub-band signal energies and a baseline energy, and responsive to a determination that motion of the object is detected, setting a flag of object presence.
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公开(公告)号：US20210067120A1
公开(公告)日：2021-03-04
申请号：US16687700
申请日：2019-11-19
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Jhao-Yi Lin , Ching-Wen Hsu
IPC: H03G3/30
Abstract: An amplification device includes an amplification circuit, an inductor, a regulator, and a impedance circuit. The amplification circuit has an input terminal for receiving a radio frequency signal, and an output terminal for outputting an amplified radio frequency signal. The inductor has a first terminal, and a second terminal coupled to the output terminal of the amplification circuit. The regulator is coupled to the first terminal of the inductor and generates a steady voltage and/or a steady current. The impedance circuit has a first terminal coupled to the output terminal of the amplification circuit, and a second terminal coupled to a first system voltage terminal. The impedance circuit provides a low frequency impedance path to suppress a beat frequency signal in the amplified radio frequency signal.
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