Invention Grant
- Patent Title: Class AB amplifier
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Application No.: US14742351Application Date: 2015-06-17
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Publication No.: US09660585B2Publication Date: 2017-05-23
- Inventor: Ayush Mittal , Gireesh Rajendran , Rahul Karmaker
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Paradice and Li LLP
- Main IPC: H03F1/02
- IPC: H03F1/02 ; H03F3/21 ; H03F3/19 ; H03F3/45 ; H03F3/24 ; H03F3/30

Abstract:
A class AB amplifier may include an input stage, a first folded cascode stage, a second folded cascode stage, and a class AB output stage. In some embodiments, the class AB output stage may provide differential output signals. The common-mode voltage of the differential output signals may be controlled via a correction signal coupled to a selected folded cascode stage. The correction signal may control the common-mode voltage of the differential output signals by altering bias currents within the selected folded cascode stage. The other cascode stage may include bias currents controlled by relatively fixed bias voltages.
Public/Granted literature
- US20160373062A1 CLASS AB AMPLIFIER Public/Granted day:2016-12-22
Information query
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