Integrated instrumentation amplifier with integrated frequency-c

Amplifiers – With semiconductor amplifying device – Including differential amplifier

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330259, 330260, 330294, H03F 345

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052587231

ABSTRACT:
An amplifier including first and second input transistors which are connected to respective first and second feedback amplification circuits associated with respective frequency-compensating capacitances. The second feedback amplification circuit has a two-stage structure and includes an internal compensating capacitance. The three frequency-compensating capacitances can have low values and can thus conveniently be integrated in the same chip as the amplifier. The amplifier can be used, in particular, as an interface between a zirconium-dioxide oxygen sensor and an electronic control unit which have different earth conductors.

REFERENCES:
patent: 4232271 (1980-11-01), Dobkin et al.
patent: 4626795 (1986-12-01), Tanaka et al.
EDN Electrical Design News, vol. 28, No. 16, Aug. 1983, pp. 133-145, Scott Wurcer, et al., "Instrumentation Amplifiers Solve Unusual Design Problems".
Electronics Letters, vol. 26, No. 8, Apr. 14, 1990, pp. 543-545, Z. Wang, "Wideband Class AB (push-pull) Current Amplifier in CMOS".
IEEE Journal of Solid-State Circuits, vol. 25, No. 1, Feb. 1990, pp. 173-182, R. K. Hester, et al., "Rail-to-Rail Common Mode Range & Nonlinear Capacitor Compensation".
Electronic Design, vol. 30, Jun. 10, 1982, pp. 177-186, L. Counts, et al., "Instrumentation Amplifier Nears Input Noise Floor".

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