-
公开(公告)号：US20250125771A1
公开(公告)日：2025-04-17
申请号：US18537821
申请日：2023-12-13
Applicant: RichWave Technology Corp.
Inventor： Po-Chun Chang
IPC: H03B5/12
Abstract: A voltage controlled oscillator includes a cross coupled pair circuit, a first capacitive circuit, a first inductor, a second inductor, a second capacitive circuit and a first switch circuit. The first capacitive circuit is arranged in parallel with the cross coupled pair circuit. The first inductor is arranged in parallel with the cross coupled pair circuit and has a center tapped node for receiving a power supply voltage. The second inductor is magnetically coupled with the first inductor and has a center tapped node for receiving a first control voltage. The second capacitive circuit is arranged in parallel with the second inductor. The first switch circuit is arranged in parallel with the second inductor and configured to be turned on or turned off by a second control voltage. The first control voltage and the second control voltage change synchronously.
-
公开(公告)号：US20250123385A1
公开(公告)日：2025-04-17
申请号：US18988962
申请日：2024-12-20
Applicant: RichWave Technology Corp
Inventor： Tse-Peng Chen
Abstract: A circuit for detecting motion of an object in an environment. The circuit comprises a transmission chain, an envelope extraction circuit, and a detector circuit. The transmission chain includes a power amplifier, a sensing circuit, and a single antenna. By the single antenna, a first wireless signal related to a transmission signal is transmitted. The transmission signal is a continuous wave signal. The single antenna can receive a second wireless signal as an incoming signal. The second wireless signal is a reflected first wireless signal from the object. The sensing circuit can obtain a modulation signal by combining the continuous wave signal and the incoming signal. The modulation signal contains a Doppler shift caused by the motion of the object. The envelope extraction circuit can extract a signal envelope from the modulation signal. The detector circuit can determine the motion of the object according to the signal envelope.
-
公开(公告)号：US20250096838A1
公开(公告)日：2025-03-20
申请号：US18542780
申请日：2023-12-18
Applicant: RichWave Technology Corp.
Inventor： Chia-Wei Hsu
IPC: H04B1/48
Abstract: A radio-frequency front-end module includes a common node, a first node, a second node, a third node, a first path, a second path and a third path. The first path may be disposed between the common node and the first node and may include an inductor. The second path may be disposed between the common node and the second node and may include a second switch. The third path may be disposed between the common node and the third node and include a third switch. When the second switch is turned on, the second path may transceive the second signal and the third switch may be turned off, such that the inductor in the first path may provide an inductive impedance for the second signal, and the third switch may provide a capacitive impedance for the second signal.
-
公开(公告)号：US12253589B2
公开(公告)日：2025-03-18
申请号：US17494794
申请日：2021-10-05
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
Abstract: A radar apparatus and an interference suppression method are provided. The radar apparatus includes a clock generator, an analog to digital converter (ADC), and a notch filter. The clock generator is configured to generate a sampling frequency. The ADC is coupled to the clock generator, and is configured to convert an analog signal into a digital signal according to the sampling frequency. The notch filter is coupled to the ADC, and is configured to attenuate one or more interfered frequencies of the digital signal. The interfered frequencies are related to the sampling frequency. Accordingly, the interference at a specific frequency and harmonics thereof may be suppressed.
-
公开(公告)号：US12184251B2
公开(公告)日：2024-12-31
申请号：US17535701
申请日：2021-11-26
Applicant: RichWave Technology Corp.
Inventor： Tien-Yun Peng , Chih-Sheng Chen
Abstract: 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.
-
Patent Agency Ranking
6.发明授权公开(公告)号：US12184172B2
公开(公告)日：2024-12-31
申请号：US18089580
申请日：2022-12-28
Applicant: RichWave Technology Corp.
Inventor： Hsien-Huang Tsai , Chih-Sheng Chen , Tien-Yun Peng
Abstract: A switch device includes a driver circuit, a switch circuit and a level transition circuit. The driver circuit includes an input terminal for receiving an input signal, an output terminal for outputting an output signal, a first terminal coupled to a first reference terminal, and a second terminal coupled to a second reference terminal. The switch circuit includes a control terminal for receiving the output signal. The level transition circuit includes a first terminal for receiving the output signal, a second terminal coupled to a third reference terminal, and a third terminal for receiving the input signal. In a transition interval, the input signal is transitioned from a first input signal level to a second input signal level, the level transition circuit transitions the output signal from a first output signal level to a third output signal level between the first output signal level and a second output signal level.
-
公开(公告)号：US20240305260A1
公开(公告)日：2024-09-12
申请号：US18506152
申请日：2023-11-10
Applicant: RichWave Technology Corp
Inventor： Hao-Min Huang
Abstract: A manufacturing method of an acoustic wave device and an acoustic wave device are provided. The manufacturing method includes providing a piezoelectric substrate. A transducer and a solder layer are provided on the piezoelectric substrate, and the transducer is covered with a passivation layer. The method further includes forming a first photoresist layer on the piezoelectric substrate, and patterning the first photoresist layer to form a first patterned photoresist layer. The first patterned photoresist layer covers an upper surface of the passivation layer and exposes an upper surface of the solder layer. The method further includes forming a metal layer on the upper surface of the solder layer and the first patterned photoresist layer, and stripping the first patterned photoresist layer.
-
8.发明公开公开(公告)号：US20240288537A1
公开(公告)日：2024-08-29
申请号：US18501015
申请日：2023-11-02
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
CPC classification number: G01S7/32 , G01S13/343 , G01S13/345
Abstract: The disclosure provides a radar apparatus, a signal processing circuit, and a signal processing method for radar apparatus. The radar apparatus includes a frequency synthesizer, a signal generator, and a transmitting front-end circuit. The frequency synthesizer generates a carrier signal. A frequency of the carrier signal changes with time within a sweep period of the carrier signal, and the carrier signal includes a frequency raising section and a frequency decreasing section. The signal generator generates a shaping signal. The shaping signal includes two sections. The two sections have different amplitudes. One of the two sections corresponds to a turn-around section between the frequency raising section and the frequency decreasing section. The transmitting front-end circuit is coupled to the frequency synthesizer and the signal generator and generates a transmitting signal according to the carrier signal and the shaping signal. In this way, the spurious peak on the spectrum is reduced.
-
公开(公告)号：US20240195411A1
公开(公告)日：2024-06-13
申请号：US18372681
申请日：2023-09-25
Applicant: RichWave Technology Corp.
Inventor： Yu-Siang Huang , Chih-Sheng Chen
IPC: H03K17/687
CPC classification number: H03K17/6871
Abstract: A radio frequency switch includes a signal terminal, a reference voltage terminal, and a shunt switch path. The shunt switch path includes a first transistor and a second transistor. The first transistor includes a first terminal coupled to the signal terminal, a second terminal, and a control terminal. The second transistor includes a first terminal coupled to the second terminal of the first transistor, a second terminal coupled to the reference terminal, and a control terminal. When the shunt switch path is switched to a first state, the shunt switch path has a first impedance. When the shunt switch path is switched to a second state, the shunt switch path has a second impedance, the first impedance and the second impedance being different. The first impedance is between 40 ohms to 85 ohms.
-
10.发明公开公开(公告)号：US20240162814A1
公开(公告)日：2024-05-16
申请号：US18089580
申请日：2022-12-28
Applicant: RichWave Technology Corp.
Inventor： Hsien-Huang Tsai , Chih-Sheng Chen , Tien-Yun Peng
IPC: H02M3/07
CPC classification number: H02M3/071
Abstract: A switch device includes a driver circuit, a switch circuit and a level transition circuit. The driver circuit includes an input terminal for receiving an input signal, an output terminal for outputting an output signal, a first terminal coupled to a first reference terminal, and a second terminal coupled to a second reference terminal. The switch circuit includes a control terminal for receiving the output signal. The level transition circuit includes a first terminal for receiving the output signal, a second terminal coupled to a third reference terminal, and a third terminal for receiving the input signal. In a transition interval, the input signal is transitioned from a first input signal level to a second input signal level, the level transition circuit transitions the output signal from a first output signal level to a third output signal level between the first output signal level and a second output signal level.
-
-
-
-
-
-
-
-
-
Search Results
382
records
(took 0.071 seconds)
