公开(公告)号：US20220163573A1

公开(公告)日：2022-05-26

申请号：US17138785

申请日：2020-12-30

Applicant: RichWave Technology Corp.

Inventor： Tien-Yun Peng ,  Hsien-Huang Tsai ,  Chih-Sheng Chen

IPC: G01R19/00 ,  H03K19/20

Abstract: A voltage state detector includes an input terminal, a voltage drop circuit, a pull-down circuit, a load circuit, a transistor, a pull-up circuit, a first output terminal, and a second output terminal. The voltage drop circuit is coupled to the input terminal. The pull-down circuit is coupled to the voltage drop circuit and a first reference terminal. The load circuit is coupled to a second reference terminal. The transistor has a first terminal coupled to the load circuit, a second terminal coupled to the first reference terminal, and a control terminal coupled to the voltage drop circuit. The pull-up circuit is coupled to the second reference terminal and the voltage drop circuit. The first output terminal is coupled to the first terminal of the transistor for outputting a first state determination signal. The second output terminal is coupled to the voltage drop circuit for outputting a second state determination signal.

公开(公告)号：US20220115994A1

公开(公告)日：2022-04-14

申请号：US17140135

申请日：2021-01-04

Applicant: RichWave Technology Corp.

Inventor： Chih-Sheng Chen ,  Tien-Yun Peng

IPC: H03F1/52 ,  H03F3/19 ,  H03K5/24

Abstract: An amplification circuit includes a switch circuit, an amplifier, and a control circuit. The switch circuit has a first terminal coupled to a radio frequency signal input terminal or a system voltage terminal, a second terminal coupled to an input terminal of the amplifier, and a control terminal configured to receive a control signal. The amplifier amplifies a radio frequency signal. The control circuit generates the control signal according to a driving current generated by the amplifier. When the control circuit determines that the amplifier operates in a high power mode, the control circuit controls the control signal to adjust a conducting level between the first terminal and the second terminal of the switch circuit according to the intensity of the driving current.

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：US10680524B2

公开(公告)日：2020-06-09

申请号：US16290975

申请日：2019-03-04

Applicant: RichWave Technology Corp.

Inventor： Chih-Sheng Chen ,  Tien-Yun Peng ,  Hsien-Huang Tsai

IPC: H02M3/24 ,  H02M1/36 ,  H02M7/10 ,  H02M3/07

Abstract: A voltage generator includes an oscillator, a charge pump, a smoothing capacitor, and a driving controller. The oscillator has an output. The charge pump has an input and an output, and the input of the charge pump is coupled to the output of the oscillator. The smoothing capacitor is coupled to the output of the charge pump. The driving controller is coupled to the oscillator, and generates an enable signal to adjust an operation frequency of the oscillator. The voltage generator supplies a driving voltage to a switch for driving the switch via the smoothing capacitor. The driving controller generates the enable signal according to the driving voltage.

公开(公告)号：US10270349B2

公开(公告)日：2019-04-23

申请号：US15398726

申请日：2017-01-05

Applicant: RichWave Technology Corp.

Inventor： Chih-Sheng Chen ,  Tien-Yun Peng

IPC: H02M3/24 ,  H02M3/07 ,  H02M1/36 ,  H02M7/10

Abstract: A voltage generator including an oscillator having an output, a charge pump having an input and an output, the input of the charge pump being coupled to the output of the oscillator, a smoothing capacitor, a resistor having an input end and an output end, wherein the input end is coupled to the charge pump and the output end is coupled to the smoothing capacitor, and a shorting element connected in parallel with the resistor and which, when turned on, causes the resistor to be at least partially bypassed, wherein the voltage generator is configured to supply voltage to a radio frequency (RF) switch via the smoothing capacitor, and a frequency of the oscillator is controlled to be faster during a switching period of the RF switch.

公开(公告)号：US20180275709A1

公开(公告)日：2018-09-27

申请号：US15839189

申请日：2017-12-12

Applicant: RICHWAVE TECHNOLOGY CORP.

Inventor： Chih-Sheng Chen ,  Tien-Yun Peng ,  Jhao-Yi Lin

IPC: G05F3/16 ,  H03F5/00 ,  H01L27/06 ,  H03F1/30

CPC classification number: G05F3/16 ,  H01L27/0629 ,  H03F1/223 ,  H03F1/301 ,  H03F1/302 ,  H03F5/00 ,  H03F2200/18 ,  H03F2200/21 ,  H03F2200/294 ,  H03F2200/451

Abstract: A bias circuit includes a first transistor, a second transistor, a first resistor and a second resistor. The first end of the first transistor is coupled to a first voltage source. One end of the first resistor is coupled to the second end of the first transistor, and the other end of the first resistor is coupled to the control terminal of the first transistor. The first end of the second transistor is coupled to a second voltage source, and the second end of the second transistor is coupled to the control terminal of the first transistor. One end of the second resistor is coupled to the other end of the first resistor, and the other end of the second resistor is coupled to the control terminal of the second transistor.

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

IPC: H03F3/45 ,  G05F1/46 ,  H03F3/04

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.

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

IPC: H03K17/10 ,  H02M3/07

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：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.

公开(公告)号：US11609249B2

公开(公告)日：2023-03-21

申请号：US17138785

申请日：2020-12-30

Applicant: RichWave Technology Corp.

Inventor： Tien-Yun Peng ,  Hsien-Huang Tsai ,  Chih-Sheng Chen

IPC: G01R19/00 ,  H03K19/20

Abstract: A voltage state detector includes an input terminal, a voltage drop circuit, a pull-down circuit, a load circuit, a transistor, a pull-up circuit, a first output terminal, and a second output terminal. The voltage drop circuit is coupled to the input terminal. The pull-down circuit is coupled to the voltage drop circuit and a first reference terminal. The load circuit is coupled to a second reference terminal. The transistor has a first terminal coupled to the load circuit, a second terminal coupled to the first reference terminal, and a control terminal coupled to the voltage drop circuit. The pull-up circuit is coupled to the second reference terminal and the voltage drop circuit. The first output terminal is coupled to the first terminal of the transistor for outputting a first state determination signal. The second output terminal is coupled to the voltage drop circuit for outputting a second state determination signal.