Title:
METHOD AND APPARATUS FOR RC/CR PHASE ERROR CALIBRATION OF MEASUREMENT RECEIVER
Document Type and Number:
WIPO Patent Application WO/2020/015712
Kind Code:
A1
Abstract:
A circuit includes a RC-CR circuit and a second circuit. The RC-CR circuit outputs a first signal at a first output node over a RC path, and a second signal at a second output node over a CR path. The second circuit is coupled to the RC-CR circuit at the first output node over the RC path. The second circuit includes an array of capacitors coupled in parallel and a plurality of switches, and each of the array of capacitors is connected, in series, to a corresponding switch in the plurality of switches. Each of the array of capacitors and its corresponding switch are coupled between the first output node and a ground. The plurality of switches is switched on or off such that the first signal and the second signal have a phase difference that falls within a predetermined phase range.
Inventors:
CHENG ZHENGUO (US)
QIU XUYA (US)
QIU XUYA (US)
Application Number:
PCT/CN2019/096597
Publication Date:
January 23, 2020
Filing Date:
July 18, 2019
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H03H11/20
Foreign References:
| US20140139279A1 | 2014-05-22 | |||
| CN1679231A | 2005-10-05 | |||
| US20080100398A1 | 2008-05-01 | |||
| US201816041118A | 2018-07-20 | |||
| US6172543B1 | 2001-01-09 |
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