Invention Grant
- Patent Title: Differential difference amplifier circuit having variable transconductance
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Application No.: US16815129Application Date: 2020-03-11
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Publication No.: US10971080B2Publication Date: 2021-04-06
- Inventor: Chih-Hsien Chou , Po-Yu Tseng , Jhih-Siou Cheng
- Applicant: NOVATEK MICROELECTRONICS CORP.
- Applicant Address: TW HsinChu
- Assignee: NOVATEK MICROELECTRONICS CORP.
- Current Assignee: NOVATEK MICROELECTRONICS CORP.
- Current Assignee Address: TW HsinChu
- Agency: McClure, Qualey & Rodack, LLP
- Main IPC: G09G3/20
- IPC: G09G3/20 ; G09G3/3283 ; H03F3/45 ; G09G3/36

Abstract:
The differential difference amplifier circuit includes a differential input stage circuit, a loading stage circuit coupled to the differential input stage circuit, and an output stage circuit coupled to the loading stage circuit. The output stage circuit is configured to generate an output signal. The differential input stage circuit includes a first differential pair having a first transconductance and a second differential pair having a second transconductance. The first differential pair is biased by a first current source and receives a first input signal and the output signal. The second differential pair is biased by a second current source and receives a second input signal and the output signal. At least one of the first transconductance and the second transconductance is adjusted according to the image data.
Public/Granted literature
- US20200211472A1 DIFFERENTIAL DIFFERENCE AMPLIFIER CIRCUIT HAVING VARIABLE TRANSCONDUCTANCE Public/Granted day:2020-07-02
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