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公开(公告)号：US10739808B2
公开(公告)日：2020-08-11
申请号：US16425964
申请日：2019-05-30
Applicant: RichWave Technology Corp.
Inventor： Kuang-Lieh Wan
Abstract: The reference voltage generator includes an output terminal, first to fourth resistors, first to fourth transistors, and a diode unit. The first transistor is coupled to the second transistor. The first resistor is coupled between the second transistor and a second reference voltage terminal. The first resistor is also coupled to the first transistor. One terminal of the diode unit is coupled to the output terminal, and the other terminal of the diode unit is coupled to the second and third resistors. The second and third resistors are also coupled to the first and second transistors, respectively. The third transistor is coupled between the fourth resistor and the second reference voltage terminal, and includes a control terminal coupled to the second transistor. The fourth transistor is coupled between a first reference voltage terminal and the diode unit. The fourth transistor is also coupled to the fourth resistor.
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公开(公告)号：US20200186129A1
公开(公告)日：2020-06-11
申请号：US16579877
申请日：2019-09-24
Applicant: RichWave Technology Corp.
Inventor： Ting-Yuan Cheng
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.
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公开(公告)号：US20200186088A1
公开(公告)日：2020-06-11
申请号：US16579870
申请日：2019-09-24
Applicant: RichWave Technology Corp.
Inventor： Ting-Yuan Cheng
Abstract: A mixer module includes a mixer, at least one DC offset circuit, a filter and a controller. The mixer mixes an input signal to generate a first signal. The at least one DC offset circuit generates a second signal based on the first signal. The filter filters out an AC portion of the second signal and generates a third signal according to a DC portion of the second signal. The controller controls the at least one DC offset circuit based on the third signal to reduce a DC portion of the first signal.
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公开(公告)号：US20200169258A1
公开(公告)日：2020-05-28
申请号：US16691503
申请日：2019-11-21
Applicant: RichWave Technology Corp.
Inventor： Tien-Yun Peng , Chih-Sheng Chen
IPC: H03K19/0185 , H03K3/037
Abstract: A driving apparatus is provided. A first stage inverter circuit and a second stage inverter circuit respectively generate a first output signal and a second output signal according to a first voltage dividing control signal and a second voltage dividing control signal, wherein the first output signal and the second output signal are respectively output to the second-stage inverter circuit and the first-stage inverter circuit to appropriately control the gate voltages of transistors of pull-up circuit and the pull-down circuit in the first-stage inverter circuit and the second-stage inverter circuit, so that source-drain voltages differences of the transistors can be more evenly distributed.
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公开(公告)号：US20200150223A1
公开(公告)日：2020-05-14
申请号：US16575403
申请日：2019-09-19
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
Abstract: An ultra-wideband radar transceiver and an operating method thereof are provided. The ultra-wideband radar transceiver includes a receiving module. The receiving module includes an I/Q signal generator, a first sensing circuit and a second sensing circuit. The I/Q signal generator receives M consecutive echo signals and generates M consecutive in-phase signals and M consecutive quadrature-phase signals accordingly, wherein M is an integer greater than 1. The first sensing circuit is coupled to the I/Q signal generator to receive the M consecutive in-phase signals and is configured to perform integration and analog-to-digital conversion on the M consecutive in-phase signals to generate a first digital data. The second sensing circuit is coupled to the I/Q signal generator to receive the M consecutive quadrature-phase signals and is configured to perform integration and analog-to-digital conversion on the M consecutive quadrature-phase signals to generate a second digital data.
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Patent Agency Ranking
公开(公告)号：US10574196B2
公开(公告)日：2020-02-25
申请号：US16153805
申请日：2018-10-07
Applicant: RichWave Technology Corp.
Inventor： Chih-Sheng Chen , Ming-Shiuan Wen
Abstract: A power amplifier device includes a first amplifier, a second amplifier, a capacitor, a node, and an impedance matching circuit. The second amplifier amplifies a radio frequency signal transmitted from the first amplifier. The capacitor is coupled between an output terminal of the first amplifier and an input terminal of the second amplifier. The node is disposed between the input terminal of the second amplifier and the capacitor. The impedance matching circuit is coupled to the node and a common voltage terminal. The impedance matching circuit is substantially an open circuit at a center frequency of the radio frequency signal. The impedance matching circuit provides substantially a short-circuited path from the node to the common voltage terminal at a frequency twice the center frequency.
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公开(公告)号：US10447215B2
公开(公告)日：2019-10-15
申请号：US15862598
申请日：2018-01-04
Applicant: RICHWAVE TECHNOLOGY CORP.
Inventor： Chih-Sheng Chen , Chang-Yi Chen
Abstract: A current compensation circuit for providing a current to an amplifier circuit includes a first amplifier, a first transistor and a first bias circuit. The first bias circuit provides a first bias current to the first amplifier. The current compensation circuit includes a power detection circuit, an operational amplifier circuit and a current-to-voltage converter. The power detection circuit detects and converts an input power or an output power of the first amplifier to a first detection voltage. The operational amplifier circuit generates a second detection voltage according to the first detection voltage and a calibration voltage. The current-to-voltage converter converts the second detection voltage to a compensation current. A first compensation current flows to the first amplifier through the first transistor according to the compensation current, such that the first amplifier is driven by the first bias current plus the first compensation current.
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公开(公告)号：US10437274B2
公开(公告)日：2019-10-08
申请号：US16157077
申请日：2018-10-10
Applicant: RichWave Technology Corp.
Inventor： Hwey-Ching Chien
Abstract: A reference voltage generator includes a voltage generation circuit, an amplifier, a diode unit and a transistor. The voltage generation circuit includes an output terminal for outputting a reference voltage, a first terminal having an operational voltage, and a second terminal. The amplifier includes an input terminal coupled to the first terminal of the voltage generation circuit, an output terminal, a first terminal coupled to a first voltage terminal, and a second terminal. The diode unit includes a first terminal coupled to the second terminal of the amplifier, and a second terminal coupled to the second terminal of the voltage generation circuit and a second voltage terminal. The transistor includes a first terminal coupled to the first terminal of the amplifier, a second terminal coupled to the output terminal of the voltage generation circuit, and a control terminal coupled to the output terminal of the amplifier.
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公开(公告)号：US20190221530A1
公开(公告)日：2019-07-18
申请号：US15956760
申请日：2018-04-19
Applicant: RichWave Technology Corp.
Inventor： Chuan-Chen Chao , E-Jen Lien
CPC classification number: H01L23/66 , H05K1/0239
Abstract: An integrated circuit and a transmission circuit thereof are provided. The transmission circuit includes an input buffer and a voltage holding circuit. The voltage holding circuit has a first end coupled to the input end of the input buffer, and a second end coupled to a reference voltage end. The voltage holding circuit includes a switch and a diode apparatus coupled in series between the first end and the second end of the voltage holding circuit. The switch is configured to receive a mode signal, and is turned on or cut off according to the mode signal.
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公开(公告)号：US10348254B2
公开(公告)日：2019-07-09
申请号：US15892361
申请日：2018-02-08
Applicant: RichWave Technology Corp.
Inventor： Yi-Fong Wang
Abstract: A protection circuit for use in an RF active circuit includes a signal strength detecting circuit, a current detecting circuit, a logic circuit, and a switching unit. The signal strength detecting circuit is coupled to the signal input end or the signal output end of the RF active circuit and configured to generate a first detecting signal according to the signal strength of the RF signal. The current detecting circuit is configured to detect the VSWR of the RF signal based on the driving current of the RF active circuit, thereby generating a corresponding second detecting signal. The logic circuit is configured to generate a switch control signal according to the first detecting signal and the second detecting signal. The switching unit is configured to lower the driving current of the RF active circuit according to the switch control signal.
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