公开(公告)号：US11048285B2

公开(公告)日：2021-06-29

申请号：US16903365

申请日：2020-06-16

Applicant: RichWave Technology Corp.

Inventor： Hwey-Ching Chien

IPC: G05F3/22 ,  G05F1/46 ,  G05F3/30

Abstract: A reference voltage generation circuit includes a supply voltage terminal, a node, a current source, an output terminal, a common voltage terminal, a bandgap reference circuit and a feedback circuit. The supply voltage terminal is used to provide a supply voltage. The current source is coupled between the supply voltage terminal and the node, and used to receive the supply voltage and generate a current according to a feedback signal, and output the current to establish at the node a first voltage substantially insensitive to the supply voltage. The common voltage terminal is used to provide a common voltage. The bandgap reference circuit is coupled between the node and the common voltage terminal, and used to establish a temperature-invariant bandgap voltage at the output terminal. The feedback circuit is coupled to the node and the current source, and used to generate the feedback signal according to the first voltage.

公开(公告)号：US20210141052A1

公开(公告)日：2021-05-13

申请号：US17028977

申请日：2020-09-22

Applicant: RichWave Technology Corp.

Inventor： Chun-Hsien Hsiao

IPC: G01S7/02 ,  G01S7/35

Abstract: A method of updating background components of an echo signal for radar includes: transforming M sets of N pieces of time domain data to frequency domain to generate M sets of P magnitudes corresponding to P frequency bins, wherein the M sets of N pieces of time domain data include spatial information of an object; and updating P background components corresponding to the P frequency bins according to the M sets of P magnitudes corresponding to the P frequency bins.

公开(公告)号：US20210135451A1

公开(公告)日：2021-05-06

申请号：US17083323

申请日：2020-10-29

Applicant: RichWave Technology Corp.

Inventor： Chuan-Chen Chao ,  Ching-Yao Pai

IPC: H02H9/04 ,  H01L27/02

Abstract: An integrated circuit includes a signal pad, receiving an input signal during a normal mode, and receive an ESD signal during an ESD mode; an internal circuit, processing the input signal during the normal mode; a variable impedance circuit, comprising a first end coupled to the signal pad, a second end coupled to the internal circuit, wherein the variable impedance circuit provides a low or high impedance path between the signal pad and the internal circuit during the normal or ESD mode; and a switch circuit, comprising a first end coupled to a control end of the variable impedance circuit, a second end coupled to a reference voltage terminal, and a control end receiving a node voltage, wherein the switch circuit switches the control end of the variable impedance circuit to have a first specific voltage or be electrically floating during the normal or ESD mode.

公开(公告)号：US10985714B2

公开(公告)日：2021-04-20

申请号：US16687507

申请日：2019-11-18

Applicant: RichWave Technology Corp.

Inventor： Wei-Kung Deng

IPC: H03F3/21 ,  H03G3/30 ,  H03F1/56 ,  H03F1/02

Abstract: The disclosure provides an amplifying apparatus including a plurality of amplifying circuits and an adjusting circuit. The input terminals of the amplifying circuits are coupled to a first common node. The output terminals of the amplifying circuits are coupled to a second common node. The adjusting circuit adjusts an input signal to generate an adjusted signal to the first common node; the adjusting circuit adjusts the signal of the second common node; or the adjusting circuit adjusts the input signal to generate the adjusted signal to the first common node and adjusts the signal of the second common node. The first control signal and the second control signal respectively control the amplifying circuits and the adjusting circuit to determine the gain, the linear power, and the output current of the amplifying apparatus.

公开(公告)号：US10958222B2

公开(公告)日：2021-03-23

申请号：US16439726

申请日：2019-06-13

Applicant: RichWave Technology Corp.

Inventor： Yi-Fong Wang

IPC: H03F3/04 ,  H03F1/30 ,  H03F3/20 ,  H03F1/32

Abstract: A bias circuit includes a current sensor, a transistor, and a low pass filter circuit. The current sensor has a first terminal coupled to a voltage terminal, and a second terminal. The transistor has a first terminal coupled to the second terminal of the current sensor, a second terminal coupled to a radio frequency signal path for providing a bias signal, and a control terminal for receiving a reference voltage. The low pass filter circuit is coupled between the second terminal of the current sensor and the control terminal of the transistor.

公开(公告)号：US10928502B2

公开(公告)日：2021-02-23

申请号：US15993574

申请日：2018-05-30

Applicant: Richwave Technology Corp.

Inventor： Sheng Chung Kuo

IPC: G01S13/56

Abstract: Methods and apparatus for detecting presence of an object in an environment, the method including receiving a Doppler signal during a frame, filtering the Doppler signal in a frequency band, determining a signal energy of the filtered Doppler signal in time domain, determining whether motion of the object is detected in accordance with the Doppler signal and a baseline energy, responsive to a determination that motion of the object is detected in accordance with the signal energy and the baseline energy, setting a flag of object presence, and responsive to a determination that motion of the object is not detected in accordance with the Doppler signal, updating the baseline energy in accordance with the signal energy.

公开(公告)号：US10917128B2

公开(公告)日：2021-02-09

申请号：US16541164

申请日：2019-08-15

Applicant: RichWave Technology Corp.

Inventor： Lu-Hung Liao

IPC: H03F1/32 ,  H04B1/04

Abstract: A signal processing device includes a signal input, a signal output, a first amplifier, a second amplifier, a first distortion adjustment circuit, and a second distortion adjustment circuit. The signal input receives a RF signal to be amplified. The signal output outputs an amplified RF signal. Each of the first and second amplifiers includes an input coupled to the signal input and an output coupled to the signal output. The first distortion adjustment circuit includes a connection coupled to the input of the first amplifier. The second distortion adjustment circuit includes a connection coupled to the input of the second amplifier. The number of transistors in the first amplifier is different from the number of transistors in the second amplifier.

公开(公告)号：US10911026B2

公开(公告)日：2021-02-02

申请号：US16579877

申请日：2019-09-24

Applicant: RichWave Technology Corp.

Inventor： Ting-Yuan Cheng

IPC: H03B1/00 ,  H03K5/00 ,  H04B1/10 ,  H03H11/04 ,  H03D7/14 ,  H04B1/54 ,  H04L5/14

Abstract: A capacitor circuit includes a first terminal, a first to a third transistor and a first capacitor. The first transistor includes a first terminal configured to be coupled to a first current source and the first terminal of the capacitor circuit, and a second terminal coupled to a reference voltage terminal. The second transistor includes a first terminal configured to be coupled to a second current source, a second terminal coupled to the reference voltage terminal, and a control terminal coupled to the first terminal of the second transistor and a control terminal of the first transistor. The third transistor includes a first terminal configured to be coupled to a third current source and the first terminal of the first transistor, a second terminal coupled to the reference voltage terminal, and a control terminal coupled to the control terminal of the second transistor. The first capacitor includes a first terminal coupled to the first terminal of the capacitor circuit, and a second terminal coupled to the control terminal of the first transistor.

公开(公告)号：US20210021290A1

公开(公告)日：2021-01-21

申请号：US16920739

申请日：2020-07-05

Applicant: RichWave Technology Corp.

Inventor： Chih-Sheng Chen ,  Tien-Yun Peng

IPC: H04B1/04 ,  H03F3/24 ,  H03K17/04

Abstract: A radio frequency signal transmission circuit includes a direct current blocking unit, a biasing impedance circuit, and a radio frequency element. The direct current blocking unit has a first terminal for receiving an input signal, and a second terminal coupled to a first bias voltage terminal. The biasing impedance circuit has a first terminal coupled to the first bias voltage terminal for providing a first bias voltage, and a second terminal coupled to a second bias voltage terminal for receiving a second bias voltage. The radio frequency element is coupled to the first bias voltage terminal, and receives and processes the input signal. When the biasing impedance circuit operates in a first mode, the biasing impedance circuit provides a first impedance. When the biasing impedance circuit operates in a second mode, the biasing impedance circuit provides a second impedance greater than the first impedance.

公开(公告)号：US20210013634A1

公开(公告)日：2021-01-14

申请号：US17037657

申请日：2020-09-29

Applicant: RichWave Technology Corp.

Inventor： Shih-Kai Lin

IPC: H01Q25/00 ,  H01Q21/24 ,  H01Q5/35

Abstract: A wireless signal transceiver device includes a dual-polarized antenna, a transmission circuit, a reception circuit and a processor. The dual-polarized antenna includes a first feed zone and a second feed zone. The first feed zone is used to receive a transmission signal for the dual-polarized antenna to transmit a first wireless signal accordingly. The second feed zone is used to output a reception signal generated according to a second wireless signal. The dual-polarized antenna is used to form a first radiated electric-field having a first co-polarization according to the first wireless signal and form a second radiated electric-field having a second co-polarization according to the second wireless signal. The first co-polarization and the second co-polarization form an angle between 45 degrees to 135 degrees to each other in a far field.