Canceling harmonics in semiconductor RF switches

Details Canceling harmonics in semiconductor RF switches Canceling harmonics in semiconductor RF switches

2006-02-03

2011-12-20

Nguyen, Duc (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Distortion, noise, or other interference prevention,...

C455S067130, C333S101000, C333S103000

Reexamination Certificate

active

08081928

ABSTRACT:
An RF switching circuit adapted to cancel selected harmonic signals. An unwanted harmonic signal Sh1at a selected harmonic frequency Fsh of an operating frequency Fo exists in a signal Si conducted by the switching circuit, possibly produced by the switching circuit due to conduction through a first nonlinear impedance Znl(1). A compensating harmonic signal Sh2is therefore generated by conduction via a nonlinear impedance Znl(2). Znl(1) may be due to parasitic conduction by “off” switching elements, while Znl(2) may be due to conduction by an “on” FET. The amplitude and/or phasing of Sh2may be adjusted by selecting components for a network coupling Znl(2) to the conducted signal Si, such that Sh2substantially cancels Sh1across a target range of input power.

REFERENCES:
patent: 4825145 (1989-04-01), Tanaka et al.
patent: 4999585 (1991-03-01), Burt et al.
patent: 5012123 (1991-04-01), Ayasli et al.
patent: 5774792 (1998-06-01), Tanaka et al.
patent: 5818283 (1998-10-01), Tonami et al.
patent: 6310508 (2001-10-01), Westerman
patent: 6316983 (2001-11-01), Kitamura
patent: 6704550 (2004-03-01), Kohama et al.
patent: 6882210 (2005-04-01), Asano et al.
patent: 6903596 (2005-06-01), Geller et al.
patent: 7057472 (2006-06-01), Fukamachi et al.
patent: 7199635 (2007-04-01), Nakatsuka et al.
patent: 2002/0126767 (2002-09-01), Ding et al.
patent: 2003/0160515 (2003-08-01), Yu et al.
patent: 2005/0212595 (2005-09-01), Kusunoki et al.
patent: 2005/0264341 (2005-12-01), Hikita et al.
patent: 2007/0290744 (2007-12-01), Adachi et al.
Weman, Eva, Communication under Rule 71(3) EPC received from the EPO for related appln. No. 02800982.7-220 dated Nov. 27, 2010, 60 pages.
Weman, Eva, Communication under Rule 71(3) EPC received from the EPO for related appln. No. 02800982.7-220 dated Nov. 27, 2009, 60 pages.
Kelly, Dylan, et al., Response and Terminal Disclaimers filed in the USPTO for related U.S. Appl. No. 11/347,014, dated Mar. 16, 2010, 5 pages.
Shifrin, Mitchell, et al., “Monolithic FET Structures for High-Power Control Component Applications”, IEEE Transactions on Microwave Theory and Techniques, vol. 37, No. 12, Dec. 1989, pp. 2134-2141.
Hoffmann, N., Summons to Attend Oral Proceedings Pursuant to Rule 115(1) EPC received from the EPO dated Jul. 22, 2011 for related appln. No. 06786943.8, 8 pgs.

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