Title:
AMPLIFIER WITH NON-LINEARITY CANCELLATION
Document Type and Number:
WIPO Patent Application WO/2020/063409
Kind Code:
A1
Abstract:
An amplifier circuit includes a primary differential amplifier circuit connected to receive a differential input and provide a primary differential output with a first non-linearity. A secondary differential amplifier circuit is connected to receive the differential input. The secondary differential amplifier circuit is configured to generate a secondary differential output with a second non-linearity. The secondary differential output and the primary differential output are coupled together with opposing polarities such that the second non-linearity cancels out at least the first non-linearity.
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Inventors:
HU YAQI (US)
Application Number:
PCT/CN2019/106317
Publication Date:
April 02, 2020
Filing Date:
September 18, 2019
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H03F3/00
Foreign References:
| US6414550B1 | 2002-07-02 | |||
| US20030045264A1 | 2003-03-06 | |||
| US20180175813A1 | 2018-06-21 |
Other References:
WU, WENXIN ET AL.: "A 180nm CMOS three stage feedforward compensation op-amp with linearity improvement technique for active RC LPF", 2016 10TH IEEE INTERNATIONAL CONFERENCE ON ANTI-COUNTERFEITING, SECURITY, AND IDENTIFICATION (ASID, 9 March 2017 (2017-03-09), pages 91 - 95, XP033074894, ISSN: 2163-5056
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