-
Patent Agency Ranking
公开(公告)号：US20180191308A1
公开(公告)日：2018-07-05
申请号：US15718079
申请日：2017-09-28
Applicant: RICHWAVE TECHNOLOGY CORP.
Inventor： CHIH-SHENG CHEN , HONG-JIA LO
CPC classification number: H03F1/0216 , H03F1/0261 , H03F1/302 , H03F1/32 , H03F1/56 , H03F3/19 , H03F3/193 , H03F3/21 , H03F3/45183 , H03F3/45475 , H03F2200/18 , H03F2200/294 , H03F2200/451 , H03F2200/555
Abstract: An amplifier device includes an amplifying unit, a bias module and an impedance unit. A first end of the amplifying unit electronically connects to a voltage source. A second end of the amplifying unit receives an input signal. The first end of the amplifying unit outputs an output signal amplified by the amplifying unit. A third end of the amplifying unit connects to a first reference potential. The bias module electrically connects to the second end of the amplifying unit for providing a bias voltage to the amplifying unit. An impedance unit is electrically connects to the bias module. An impedance value of the impedance unit is variable. The bias module adjusts the amplifier's linearity according to a frequency value of the input signal, a voltage value of the voltage source or a temperature value of the amplifier device. The impedance is adjusted according to the above-mentioned values.
-
公开(公告)号：US20190041890A1
公开(公告)日：2019-02-07
申请号：US15862598
申请日：2018-01-04
Applicant: RICHWAVE TECHNOLOGY CORP.
Inventor： CHIH-SHENG CHEN , CHANG-YI CHEN
CPC classification number: H03F3/211 , H03F1/0233 , H03F1/14 , H03F3/189 , H03F3/19 , H03F3/191 , H03F3/21 , H03F3/24 , H03F3/245 , H03F2200/408 , H03F2200/451 , H03F2200/456
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.
-
公开(公告)号：US20180294718A1
公开(公告)日：2018-10-11
申请号：US15844598
申请日：2017-12-17
Applicant: RICHWAVE TECHNOLOGY CORP.
Inventor： CHIH-SHENG CHEN , SHENG-TSUNG WANG
IPC: H02M3/156
CPC classification number: H02M3/156 , H02J7/00 , H02M2003/1566
Abstract: A power control circuit provides a supply voltage, and includes a voltage regulating circuit and a signal selecting circuit. The voltage regulating circuit is coupled to a power supply voltage and the output end of the power control circuit, and receives a first control signal for outputting the supply voltage. The signal selecting circuit has a first input end, a second input end and a third input end. The first input end of the signal selecting circuit receives a first input signal, the second input end of the signal selecting circuit receives a second input signal, and the third input end of the signal selecting circuit receives a second control signal. The first input signal is related to the power supply voltage. One of the first input signal and the second input signal is chosen and outputted as the first control signal according to the second control signal.
-
公开(公告)号：US20180191313A1
公开(公告)日：2018-07-05
申请号：US15730241
申请日：2017-10-11
Applicant: RICHWAVE TECHNOLOGY CORP.
Inventor： CHIH-SHENG CHEN , CHIA-JUNG YEH
CPC classification number: H03F3/19 , H03F3/211 , H03F3/72 , H03F2200/408 , H03F2203/21131 , H03F2203/7239
Abstract: An amplification circuit includes a first amplifier circuit and a second-stage amplifier. The second-stage amplifier is connected to the amplifier to form a multi-stage amplification circuit. The first amplifier circuit includes a first-stage amplifier and a bypass circuit. The bypass circuit includes a first transistor. A first end of the first transistor is coupled to the input end of the first amplifier circuit, a second end of the first transistor is coupled to the output end of the first amplifier circuit, and a third end of the first transistor is coupled to a supply voltage. The first end of the first transistor is further coupled to a first control terminal to receive a control signal for controlling a bias voltage of the first transistor, so as to make the amplification circuit work in different operation modes.
-
公开(公告)号：US20230031137A1
公开(公告)日：2023-02-02
申请号：US17499831
申请日：2021-10-12
Applicant: RICHWAVE TECHNOLOGY CORP.
Inventor： CHIH-SHENG CHEN , Ching-Wen Hsu
Abstract: An amplifier circuit having an adjustable gain is provided. The amplifier circuit includes an input terminal, an output terminal, an amplifier, and an attenuation circuit. The input terminal receives an input signal, which is in turn received by an input terminal of the amplifier. An output terminal of the amplifier outputs the input signal that is amplified. The attenuation circuit is coupled between the output terminal of the amplifier and the output terminal to provide a plurality of attenuation to the input signal that is amplified and generate a first attenuation signal, or between the input terminal and the output terminal to provide the plurality of attenuations to the input signal and generate a second attenuation signal. A difference between an impedance value of the input terminal of the attenuation circuit and an impedance value of the output terminal of the attenuation circuit is within a predetermined range.
-
-
-
-
Search Results
5
records
(took 0.015 seconds)
