Communications: electrical – Selective – Interrogation response
Reexamination Certificate
2007-01-02
2007-01-02
Hofsass, Jeffery (Department: 2612)
Communications: electrical
Selective
Interrogation response
C340S010400, C340S010100, C340S010200, C340S531000
Reexamination Certificate
active
10855865
ABSTRACT:
A circuit arrangement for phase modulation in an input circuit of a backscattering transponder includes a varactor and at least one capacitor connected in series between two antenna terminals, and at least two voltage sources selectively connected through at least two switches to at least one terminal of the varactor. A control unit selectively opens and closes the switches in response to the data to be phase-modulated onto the backscattered signal. By selectively connecting the different voltage values of the respective voltage sources to the varactor terminal(s) through the switches, the capacitance of the varactor and correspondingly the input impedance of the input circuit are thereby varied, so as to provide respective different phase positions of the phase modulation.
REFERENCES:
patent: 4040053 (1977-08-01), Olsson
patent: 5119099 (1992-06-01), Haruyama et al.
patent: 5153583 (1992-10-01), Murdoch
patent: 5206639 (1993-04-01), Kamens
patent: 5218343 (1993-06-01), Stobbe et al.
patent: 5564069 (1996-10-01), Grabow et al.
patent: 5606323 (1997-02-01), Heinrich et al.
patent: 5731691 (1998-03-01), Noto
patent: 5889489 (1999-03-01), Friedman et al.
patent: 6054925 (2000-04-01), Proctor et al.
patent: 6347121 (2002-02-01), Sointula
patent: 6366164 (2002-04-01), Hanselmann
patent: 6621467 (2003-09-01), Marsh
patent: 6664770 (2003-12-01), Bartels
patent: 6941113 (2005-09-01), Asano
patent: 2002/0080864 (2002-06-01), Kuttruff et al.
patent: 2002/0153996 (2002-10-01), Chan et al.
patent: 2003/0102961 (2003-06-01), Fischer et al.
patent: 2003/0107483 (2003-06-01), Kano
patent: 2003/0205571 (2003-11-01), Flugstad et al.
patent: 2004/0145452 (2004-07-01), Fischer et al.
patent: 2004/0155754 (2004-08-01), Fischer et al.
patent: 2004/0257293 (2004-12-01), Friedrich et al.
patent: 4017625 (1990-12-01), None
patent: 4332475 (1995-03-01), None
patent: 196 14 455 (1997-10-01), None
patent: 198 00 565 (1999-07-01), None
patent: 19933978 (2001-01-01), None
patent: 10158442 (2003-06-01), None
patent: 0 599 143 (1994-06-01), None
patent: 1026832 (2000-08-01), None
patent: 1 120 734 (2001-08-01), None
patent: 1211635 (2002-06-01), None
patent: 1 326 202 (2003-07-01), None
patent: 2 644 308 (1990-09-01), None
patent: 2 224 182 (1990-04-01), None
patent: 2321726 (1998-08-01), None
Fischer Martin
Friedrich Ulrich
Karthaus Udo
Atmel Germany GmbH
Au Scott
Fasse W. F.
Fasse W. G.
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