Front end for an instrumentation amplifier

Details Front end for an instrumentation amplifier Front end for an instrumentation amplifier

2007-02-05

2008-10-07

Choe, Henry K (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including protection means

C330S069000

Reexamination Certificate

active

07432766

ABSTRACT:
An amplifier system includes an instrumentation amplifier arrangement being designed to amplify the difference between two voltage inputs with a defined gain, and to produce a single-ended output referenced to a known reference point. A front end circuit is coupled to the instrumentation amplifier. The front end circuit is configured to include a current clamp to actively limit the current in a gain resistor of the instrumentation amplifier to prevent input currents flowing when the instrumentation amplifier is over-driven.

REFERENCES:
patent: 5075633 (1991-12-01), Bowers
patent: 5142242 (1992-08-01), Schaffer
patent: 5451902 (1995-09-01), Huang et al.
patent: 7248116 (2007-07-01), Chiu
Analog Devices, Inc., “Precision, Low Cost, High Speed, BiFET Op Amp” AD711, pp. 1-14, 2002.
Analog Devices, Inc., “Precision Instrumentation Amplifier” AD524, pp. 1-16, 1999.

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