Amplifier apparatus for use with a sensor

Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Nonlinear amplifying circuit

Reexamination Certificate

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C327S067000

Reexamination Certificate

active

10765599

ABSTRACT:
An apparatus for use with a sensor includes first and second signal treating circuit segments coupled with the sensor for presenting a substantially balanced differential signaling representation of output signals from the sensor. Each respective signal treating circuit segment comprises a plurality of circuit elements having different electrical symmetries coupled in parallel and establishing a plurality of parallel signal paths having asymmetric signal handling characteristics. A feedback circuit is coupled with the first and second signal treating circuit segments and provides feedback signals to selected circuit elements in each of the first and second signal treating circuit segments. The feedback signals effect substantially balanced signal handling among the selected circuit elements having similar electrical symmetries.

REFERENCES:
patent: 5559646 (1996-09-01), Voorman et al.
patent: 6667842 (2003-12-01), Comeau et al.
patent: 6707625 (2004-03-01), Leighton et al.
patent: 2002/0154435 (2002-10-01), Comeau et al.
Veenstra, Hugo; Mulder, Jan; Le, Iuan; and Grillo, Giuseppe; A 1 Gb/s Read/Write-Preamplifier for Hard-Disk-Drive Applications; IEEE Solid-State Circuits Conference, Feb. 2001; Session 12, Signal Processing for Storage and Coding.

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