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公开(公告)号：US20240183938A1
公开(公告)日：2024-06-06
申请号：US18088780
申请日：2022-12-27
Applicant: RichWave Technology Corp.
Inventor： Chiang-Hua Yeh
CPC classification number: G01S7/282 , H03D7/1458
Abstract: A signal generation circuit, a radar apparatus, and a signal control method are provided. The signal generation circuit includes a digital-to-analog converter (DAC) and a mixer. The DAC is configured to convert an input digital signal into two signals in a first mode. A coding content of the input digital signal includes multiple bits. The mixer is coupled to the DAC to respectively input the two signals converted from the input digital signal to two input ports of the mixer in the first mode, to generate an output signal. An output power of the output signal corresponding to the input digital signal having a first coding content is different from an output power of the output signal corresponding to the input digital signal having a second coding content. An intensity of the output signal is related to a voltage difference between the two signals converted from the input digital signal.
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公开(公告)号：US11870445B2
公开(公告)日：2024-01-09
申请号：US17411068
申请日：2021-08-25
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Yu-Hsiang Chu
IPC: H03K5/1252 , G05F1/56
CPC classification number: H03K5/1252 , G05F1/56
Abstract: A radio frequency (RF) device and a voltage generation and harmonic suppressor thereof are provided. The RF device includes the voltage generation and harmonic suppressor and a RF circuit. The voltage generation and harmonic suppressor is configured to receive a RF signal to output at least one direct current (DC) voltage related to the RF signal, and configured to suppress a harmonic generated by the RF signal in the voltage generation and harmonic suppressor. The RF circuit is configured to receive the RF signal, and configured to perform an operation according to the at least one DC voltage.
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公开(公告)号：US11789049B2
公开(公告)日：2023-10-17
申请号：US17137383
申请日：2020-12-30
Applicant: RichWave Technology Corp.
Inventor： Shun-Nan Tai
CPC classification number: G01R21/14 , G01R15/005 , H03K17/56
Abstract: A power detector includes a detection circuit and a bias circuit. The detection circuit is used to receive an input signal and output a power indication signal. The bias circuit includes a first impedance unit, a second impedance unit and a transistor. The transistor includes a first terminal and a control terminal coupled to the first impedance unit, and a second terminal. The second impedance unit is coupled between the first terminal of the transistor and an output terminal of the bias circuit, or between the second terminal of the transistor and a second terminal of the bias circuit. The output terminal of the bias circuit is coupled to an input terminal of the detection circuit, and is used to output a bias signal.
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公开(公告)号：US20230246600A1
公开(公告)日：2023-08-03
申请号：US18084569
申请日：2022-12-20
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Hung-Chia Lo , Chia-Jung Yeh
CPC classification number: H03F1/302 , H03F3/04 , H03F2200/129
Abstract: An amplifier circuit includes an amplifier, a detector and an adjustment circuit. The amplifier includes a first transistor and a bias voltage terminal. The first transistor includes a first terminal coupled to a first reference voltage terminal, a second terminal coupled to a second reference voltage terminal, and a control terminal coupled to the bias voltage terminal of the amplifier. The second transistor includes a first terminal coupled to a third reference voltage terminal and the detector, and a second terminal coupled to the second reference voltage terminal. The detector outputs a detection signal related to a characteristic parameter of the second transistor. The adjustment circuit is coupled to the detector and the bias voltage terminal of the amplifier for performing an adjustment operation according to the detection signal.
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公开(公告)号：US20230198565A1
公开(公告)日：2023-06-22
申请号：US17688916
申请日：2022-03-08
Applicant: RichWave Technology Corp.
Inventor： Yu-Siang Huang , Chih-Sheng Chen
CPC classification number: H04B1/1615 , H04B1/18 , H04B1/44
Abstract: A radio frequency (RF) switch includes a signal terminal, a reference voltage terminal and a shunt switch path. The shunt switch path includes a first sub-shunt circuit and a second sub-shunt circuit. The second sub-shunt circuit includes a first transistor and a second transistor coupled in parallel. When switched to a first state, the RF switch has first impedance; when switched to a second state, the RF switch has second impedance; and when switched to a third state, the RF switch has third impedance. The first impedance, the second impedance, and the third impedance are different.
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Patent Agency Ranking
公开(公告)号：US20230179242A1
公开(公告)日：2023-06-08
申请号：US17570361
申请日：2022-01-06
Applicant: RichWave Technology Corp.
Inventor： Pei-Chuan Hsieh , Chih-Sheng Chen , Hang Chang
CPC classification number: H01Q5/335 , H04B1/1036 , H01Q5/392 , H04B2001/1072
Abstract: A radio frequency (RF) device and a multi-band matching circuit thereof are provided. The multi-band matching circuit includes an inductance circuit, a first capacitance circuit, an inductor, and a second capacitance circuit. A first terminal of the inductance circuit is coupled to a RF signal input terminal of the multi-band matching circuit. A first terminal of the first capacitance circuit is coupled to a second terminal of the inductance circuit. A first terminal of the inductor and a first terminal of the second capacitance circuit are coupled to a second terminal of the first capacitance circuit. A second terminal of the inductor is coupled to a first reference voltage. A second terminal of the second capacitance circuit is coupled to a second reference voltage. The second capacitance circuit is controlled by a single-bit control signal to change a capacitance value of the second capacitance circuit.
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公开(公告)号：US11632106B1
公开(公告)日：2023-04-18
申请号：US17540258
申请日：2021-12-02
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Chih-Che Lin , Yu-Siang Huang , Hsuan-Der Yen
Abstract: A switch device includes a first node, a switch unit, an adjustment switch, an impedance element, a second node and a detection unit. A first terminal of the switch unit is coupled to the first node. A first terminal and a second terminal of the adjustment switch are respectively coupled to a second terminal of the switch unit and a reference voltage terminal. A first terminal and a second terminal of the impedance element are respectively coupled to the first terminal and the second terminal of the adjustment switch. The detection unit is coupled to the second node, and a control terminal of the switch unit and a control terminal of the adjustment switch. The detection unit detects a node signal at the second node to accordingly control the switch unit and the adjustment switch.
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公开(公告)号：US20230100893A1
公开(公告)日：2023-03-30
申请号：US17496766
申请日：2021-10-08
Applicant: RichWave Technology Corp.
Inventor： Chun-Hao Wei , Chih-Sheng Chen
IPC: H03K17/56
Abstract: The switch device includes a first circuit. The first circuit has a first end coupled between a first terminal and a second terminal, and the first circuit has the second end coupled between the first terminal and the second terminal or coupled to a third terminal. The first circuit includes a first switch and a second switch. The first switch is coupled between the first end and the second end of the first circuit and is turned on or off according to a first control signal. The second switch is connected to the first switch in parallel and is turned on or off according to a second control signal. The first switch and the second switch include transistors of the same type. In a surge protection mode, the second switch is turned on to dissipate the surge current.
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公开(公告)号：US20230078775A1
公开(公告)日：2023-03-16
申请号：US17570343
申请日：2022-01-06
Applicant: RichWave Technology Corp.
Inventor： Shun-Pin Yang , Hsiang-Feng Chi
Abstract: A frequency modulated continuous wave (FMCW) radar device and a signal processing method thereof are provided. The frequency modulated continuous wave radar device includes a transmitter stage circuit, a frequency synthesizer, a receiver stage circuit, a pre-stage circuit, and a signal processing circuit. The transmitter stage circuit transmits a transmitting signal. The frequency synthesizer generates the transmitting signal associated with a chirp period. The receiver stage circuit receives a receiving signal including a periodic interference signal with a noise period associated with the chirp period. The pre-stage circuit outputs a to-be-processed signal including multiple frames according to the receiving signal and the transmitting signal. The signal processing circuit groups the frames into multiple frame groups. The signal processing circuit generates a processed signal by sampling at least one frame from the multiple frames in each of the frame groups with an identical sampling rule.
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公开(公告)号：US11601100B2
公开(公告)日：2023-03-07
申请号：US16945916
申请日：2020-08-02
Applicant: RichWave Technology Corp.
Inventor： Hwey-Ching Chien , Chih-Sheng Chen , Jhao-Yi Lin , Ching-Wen Hsu
Abstract: The frequency detector includes a first impedance circuit and a second impedance circuit. The first impedance circuit has a first terminal for receiving an input signal, and a second terminal for outputting a divisional signal. The second impedance circuit has a first terminal coupled to the second terminal of the first impedance circuit, and a second terminal coupled to a first system voltage terminal. The frequency response of the first impedance circuit is different from a frequency response of the second impedance circuit. The resistance of the first impedance circuit, a resistance of the second impedance circuit, and the divisional signal change with a frequency of the input signal.
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