Electricity: electrical systems and devices – Safety and protection of systems and devices – Impedance insertion
Reexamination Certificate
2005-11-29
2005-11-29
Leja, Ronald (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Impedance insertion
Reexamination Certificate
active
06970337
ABSTRACT:
A floating symmetrical current limiter device blocks large bipolar input signals to the input circuit of an instrumentation device by transitioning between a low-impedance mode and a high-impedance mode. The current limiter device includes a signal path and a control path that are each coupled between an input terminal and an output terminal. The signal path has a low impedance that passes small differential signals across the limiter from the input terminal to the output terminal. The control path is responsive to large bipolar signals that appear across the limiter terminals by transitioning between a voltage divider and a constant-current source-based bias that controls the impedance of the signal path to become a large impedance, thereby blocking the large bipolar input signal from the output terminal.
REFERENCES:
patent: 3603811 (1971-09-01), Day et al.
patent: 4405964 (1983-09-01), Woods et al.
patent: 4533970 (1985-08-01), Brown
patent: 4744369 (1988-05-01), Kroll
patent: 4868703 (1989-09-01), Yoshioka
patent: 4891728 (1990-01-01), Preis et al.
patent: 5196980 (1993-03-01), Carson
patent: 5235201 (1993-08-01), Honna
patent: 5272392 (1993-12-01), Wong et al.
patent: 5383082 (1995-01-01), Nishizawa
patent: 5422593 (1995-06-01), Fujihira
patent: 5517379 (1996-05-01), Williams et al.
patent: 5559658 (1996-09-01), Cooper et al.
patent: 5585991 (1996-12-01), Williams
patent: 5684663 (1997-11-01), Mitter
patent: 5729418 (1998-03-01), Lei
patent: 5734261 (1998-03-01), Knudsen
patent: 5742463 (1998-04-01), Harris
patent: 5781390 (1998-07-01), Notaro et al.
patent: 5815356 (1998-09-01), Rodriguez et al.
patent: 6046476 (2000-04-01), Morishita et al.
patent: 6163712 (2000-12-01), Winkler et al.
patent: 6507471 (2003-01-01), Colclaser et al.
patent: 6518799 (2003-02-01), Yoshida
patent: 6529355 (2003-03-01), Becker et al.
patent: 6714393 (2004-03-01), Nostrand
patent: 2001/0053054 (2001-12-01), Andoh
patent: 2002/0071230 (2002-06-01), Colclasser et al.
patent: 2002/0075617 (2002-06-01), Ponton et al.
patent: 2002/0159212 (2002-10-01), Oughton, Jr.
patent: 2003/0038658 (2003-02-01), Theogarajan
patent: 2003/0052368 (2003-03-01), Tsuji et al.
patent: 2003/0076643 (2003-04-01), Chu et al.
patent: 2003/0086221 (2003-05-01), Chu et al.
patent: 2003/0090855 (2003-05-01), Chu et al.
LND1 Series Application Note AN-D11, ±500 Volt Protection Circuit, Supertex Inc., www.supertex.com, Aug. 14, 2000.
Curtin, L.L.C. Joseph P.
Leja Ronald
Linear X Systems Inc.
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