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Title:
SINGLE-ENDED TO DIFFERENTIAL SIGNAL CONVERSION OF ANALOG SIGNALS
Document Type and Number:
WIPO Patent Application WO/2020/081181
Kind Code:
A3
Abstract:
This disclosure provides systems and apparatuses for converting a single-ended analog signal into a differential analog signal. In some implementations, a single-ended to differential signal converter may include an N-path filter to generate a 180 degree phase-shifted version of a single-ended input signal. The single-ended input signal and the 180 degree phase-shifted version of the single-ended input signal together may form a differential signal. In some implementations, the N-path filter may delay the single-ended input through a series of switched capacitors.

Inventors:
PARK JOUNG WON (US)
ABDEL GHANY EHAB (US)
CHANG LI-CHUNG (US)
Application Number:
PCT/US2019/051651
Publication Date:
July 23, 2020
Filing Date:
September 18, 2019
Export Citation:
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Assignee:
QUALCOMM INC (US)
International Classes:
H03H19/00; H03F3/45
Domestic Patent References:
WO2019219204A12019-11-21
Other References:
SHARMA PRATEEK KUMAR ET AL: "A widely tunable balun based on 2-port N-path bandpass filters with embedded phase shifting", 2017 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS), IEEE, 28 May 2017 (2017-05-28), pages 1 - 4, XP033156163, DOI: 10.1109/ISCAS.2017.8050500
ZEXUE LIU ET AL: "A 2.4-mW interference-resilient receiver front end with series N-path filter-based balun for body channel communication", INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS, vol. 46, no. 11, 19 July 2018 (2018-07-19), pages 2118 - 2133, XP055698268, ISSN: 0098-9886, DOI: 10.1002/cta.2519
REISKARIMIAN NEGAR ET AL: "Analysis and Design of Two-Port N-Path Bandpass Filters With Embedded Phase Shifting", IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II: EXPRESS BRIEFS, IEEE, US, vol. 63, no. 8, 1 August 2016 (2016-08-01), pages 728 - 732, XP011618159, ISSN: 1549-7747, [retrieved on 20160728], DOI: 10.1109/TCSII.2016.2530338
KORNEGAY K ED - INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS: "60 GHz radio design challenges", GAAS IC SYMPOSIUM. 25TH. ANNUAL IEEE GALLIUM ARSENIDE INTEGRATED CIRCUIT SYMPOSIUM. TECHNICAL DIGEST 2003. SAN DIEGO, CA, NOV. 9 - 12, 2003; [GAAS IC SYMPOSIUM - IEEE GALLIUM ARSENIDE INTEGRATED CIRCUIT SYMPOSIUM], NEW YORK, NY : IEEE, US, 9 November 2003 (2003-11-09), pages 89 - 92, XP032414428, ISBN: 978-0-7803-7833-9, DOI: 10.1109/GAAS.2003.1252370
Attorney, Agent or Firm:
MANN, Liberty, E. (US)
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