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公开(公告)号：US20180337646A1
公开(公告)日：2018-11-22
申请号：US15716789
申请日：2017-09-27
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Chih-Wen Lu , Po-Yu Tseng , Jhih-Siou Cheng , Shang-I Liu , Chih-Hsien Chou
Abstract: An operational amplifier circuit is provided. The operational amplifier circuit includes a differential input stage circuit and a loading stage circuit. The differential input stage circuit includes a first current source, a first transistor, a second transistor, a third transistor, and a fourth transistor. The control terminal of the first transistor receives a first input signal. The control terminal of the second transistor receives a second input signal. The third transistor has a first terminal coupled to the second terminal of the first transistor, a second terminal coupled to the first current source, and a control terminal coupled to the control terminal of the second transistor. The fourth transistor has a first terminal coupled to the second terminal of the second transistor, a second terminal coupled to the first current source, and a control terminal coupled to the control terminal of the first transistor.
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2.发明授权公开(公告)号：US10673391B2
公开(公告)日：2020-06-02
申请号：US16402349
申请日：2019-05-03
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Chih-Wen Lu , Chih-Hsien Chou , Po-Yu Tseng , Jhih-Siou Cheng
Abstract: An operational amplifier circuit is provided. The operational amplifier circuit includes a differential input stage circuit and a loading stage circuit. The differential input stage circuit includes an input circuit, a voltage maintaining circuit, and a current source. The input circuit includes a first input transistor and a second input transistor, for receiving a first and a second input signals, respectively. The voltage maintaining circuit includes a first branch circuit and a second branch circuit. The first branch circuit is coupled to the first input transistor for receiving the first input signal, and the second branch circuit is coupled to the second input transistor for receiving the second input signal. The current source is coupled to the first input transistor and the second input transistor. The loading stage circuit is coupled to the voltage maintaining circuit.
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公开(公告)号：US10326411B2
公开(公告)日：2019-06-18
申请号：US15802617
申请日：2017-11-03
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Chih-Wen Lu , Chih-Hsien Chou , Po-Yu Tseng , Jhih-Siou Cheng
Abstract: An operational amplifier circuit is provided. The operational amplifier circuit includes a differential input stage circuit and a loading stage circuit. The differential input stage circuit includes an input circuit, a voltage maintaining circuit, and a current source. The input circuit includes a first input transistor and a second input transistor, for receiving a first and a second input signals, respectively. The voltage maintaining circuit includes a first branch circuit and a second branch circuit. The first branch circuit is coupled to the first input transistor for receiving the first input signal, and the second branch circuit is coupled to the second input transistor for receiving the second input signal. The current source is coupled to the first input transistor and the second input transistor. The loading stage circuit is coupled to the voltage maintaining circuit.
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4.发明申请公开(公告)号：US20180337642A1
公开(公告)日：2018-11-22
申请号：US15802617
申请日：2017-11-03
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Chih-Wen Lu , Chih-Hsien Chou , Po-Yu Tseng , Jhih-Siou Cheng
CPC classification number: H03F1/3205 , H03F1/086 , H03F1/301 , H03F1/3211 , H03F1/523 , H03F3/45183 , H03F3/4521 , H03F3/45219 , H03F3/45237 , H03F3/45381 , H03F3/45632 , H03F2203/45342 , H03F2203/45352 , H03F2203/45382 , H03F2203/45384 , H03K17/063 , H03K17/0822
Abstract: An operational amplifier circuit is provided. The operational amplifier circuit includes a differential input stage circuit and a loading stage circuit. The differential input stage circuit includes an input circuit, a voltage maintaining circuit, and a current source. The input circuit includes a first input transistor and a second input transistor, for receiving a first and a second input signals, respectively. The voltage maintaining circuit includes a first branch circuit and a second branch circuit. The first branch circuit is coupled to the first input transistor for receiving the first input signal, and the second branch circuit is coupled to the second input transistor for receiving the second input signal. The current source is coupled to the first input transistor and the second input transistor. The loading stage circuit is coupled to the voltage maintaining circuit.
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Patent Agency Ranking
公开(公告)号：US11067608B2
公开(公告)日：2021-07-20
申请号：US16441027
申请日：2019-06-14
Applicant: Novatek Microelectronics Corp.
Inventor： Chih-Wen Lu , Chih-Hao Lin , Jhih-Siou Cheng , Chieh-An Lin
Abstract: A current sensor including a voltage generation circuit and a voltage integration circuit is provided. The voltage generation circuit is configured to generate a first voltage according to a current to be sensed. The voltage integration circuit is coupled to the voltage generation circuit and configured to receive the first voltage and a second voltage to generate an output voltage. The voltage integration circuit includes a first amplifier, a second amplifier and a first capacitor. The first amplifier is configured to receive the first voltage and the second voltage to generate a third voltage. The second amplifier is coupled to the first amplifier and configured to receive the third voltage to generate the output voltage. The first capacitor is coupled between an output terminal of the voltage generation circuit and an output terminal of the first amplifier and configured to reduce a voltage difference between the first voltage and the second voltage.
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公开(公告)号：US11196397B2
公开(公告)日：2021-12-07
申请号：US16731041
申请日：2019-12-31
Applicant: NOVATEK Microelectronics Corp.
Inventor： Chih-Wen Lu , Chieh-An Lin , Yen-Ru Kuo , Jhih-Siou Cheng , Ju-Lin Huang
IPC: G09G3/3225 , H03F3/45
Abstract: The present invention includes a current integrator for an organic light-emitting diode (OLED) panel. The current integrator includes an operational amplifier, which includes an output stage. The output stage, coupled to an output terminal of the current integrator, includes a first output transistor, a second output transistor, a first stack transistor and a second stack transistor. The first stack transistor is coupled between the first output transistor and the output terminal. The second stack transistor is coupled between the second output transistor and the output terminal.
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公开(公告)号：US20210203291A1
公开(公告)日：2021-07-01
申请号：US16731041
申请日：2019-12-31
Applicant: NOVATEK Microelectronics Corp.
Inventor： Chih-Wen Lu , Chieh-An Lin , Yen-Ru Kuo , Jhih-Siou Cheng , Ju-Lin Huang
IPC: H03F3/45 , G09G3/3225
Abstract: The present invention includes a current integrator for an organic light-emitting diode (OLED) panel. The current integrator includes an operational amplifier, which includes an output stage. The output stage, coupled to an output terminal of the current integrator, includes a first output transistor, a second output transistor, a first stack transistor and a second stack transistor. The first stack transistor is coupled between the first output transistor and the output terminal. The second stack transistor is coupled between the second output transistor and the output terminal.
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8.发明申请公开(公告)号：US20190260334A1
公开(公告)日：2019-08-22
申请号：US16402349
申请日：2019-05-03
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Chih-Wen Lu , Chih-Hsien Chou , Po-Yu Tseng , Jhih-Siou Cheng
Abstract: An operational amplifier circuit is provided. The operational amplifier circuit includes a differential input stage circuit and a loading stage circuit. The differential input stage circuit includes an input circuit, a voltage maintaining circuit, and a current source. The input circuit includes a first input transistor and a second input transistor, for receiving a first and a second input signals, respectively. The voltage maintaining circuit includes a first branch circuit and a second branch circuit. The first branch circuit is coupled to the first input transistor for receiving the first input signal, and the second branch circuit is coupled to the second input transistor for receiving the second input signal. The current source is coupled to the first input transistor and the second input transistor. The loading stage circuit is coupled to the voltage maintaining circuit.
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公开(公告)号：US10224886B2
公开(公告)日：2019-03-05
申请号：US15716789
申请日：2017-09-27
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Chih-Wen Lu , Po-Yu Tseng , Jhih-Siou Cheng , Shang-I Liu , Chih-Hsien Chou
Abstract: An operational amplifier circuit is provided. The operational amplifier circuit includes a differential input stage circuit and a loading stage circuit. The differential input stage circuit includes a first current source, a first transistor, a second transistor, a third transistor, and a fourth transistor. The control terminal of the first transistor receives a first input signal. The control terminal of the second transistor receives a second input signal. The third transistor has a first terminal coupled to the second terminal of the first transistor, a second terminal coupled to the first current source, and a control terminal coupled to the control terminal of the second transistor. The fourth transistor has a first terminal coupled to the second terminal of the second transistor, a second terminal coupled to the first current source, and a control terminal coupled to the control terminal of the first transistor.
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