Invention Grant
- Patent Title: Amplifier, fully-differential amplifier and delta-sigma modulator
- Patent Title (中): 放大器,全差分放大器和Δ-Σ调制器
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Application No.: US14134944Application Date: 2013-12-19
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Publication No.: US09007249B2Publication Date: 2015-04-14
- Inventor: Chen-Yen Ho , Chi-Lun Lo , Hung-Chieh Tsai , Yu-Hsin Lin
- Applicant: MediaTek Inc.
- Applicant Address: TW Hsin-Chu
- Assignee: MediaTek Inc.
- Current Assignee: MediaTek Inc.
- Current Assignee Address: TW Hsin-Chu
- Agency: McClure, Qualey & Rodack, LLP
- Main IPC: H03M3/00
- IPC: H03M3/00 ; H03F3/45 ; H03F3/26 ; H03F3/30

Abstract:
An amplifier includes a front-end gain stage and an AC-coupled push-pull output stage. The AC-coupled push-pull output stage includes a first transistor, having a source, a drain and a gate, wherein the source of the first transistor is coupled to a first voltage level; a second transistor, having a source, a drain and a gate, wherein the source of the second transistor is coupled to a second voltage level, the gate of the second transistor is coupled to the front-end gain stage, and the drain of the second transistor is coupled to the drain of the first transistor to form an output terminal of the amplifier; an AC-coupled capacitor, which is a passive two terminal electrical component coupled between the front-end gain stage and the gate of the first transistor; and a resistance component, coupling the gate of the first transistor to a bias voltage level.
Public/Granted literature
- US20140103999A1 AMPLIFIER, FULLY-DIFFERENTIAL AMPLIFIER AND DELTA-SIGMA MODULATOR Public/Granted day:2014-04-17
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