High precision composite amplifier with improved high speed resp

Details High precision composite amplifier with improved high speed resp High precision composite amplifier with improved high speed resp

1990-06-29

1991-09-03

LaRoche, Eugene R.

Amplifiers

Signal feedback

Phase shift means in loop path

330 9, 330109, 330294, 330126, 330151, H03F 3191

Patent

active

050458051

ABSTRACT:
A high precision composite amplifier for use in a data acquisition subsystem of a Computerized Tomography (CT) scanner provides enhanced high speed response in terms of reduced settling time. The speed improvement is due to a novel compensation network in which a high frequency pole and a zero in the open loop response characteristic for the composite amplifier are forced to cancel despite component and temperature variations. The resulting amplifier exhibits a simple, higher speed, single pole response. An adjustable circuit is provided for adjusting the placement of the zero to assure optimum pole/zero cancellation.

REFERENCES:
patent: 4459554 (1987-07-01), Mattisson
Active Filters With Zero Amplifier Sensitivity by Geiger et al. pp. 277-288; IEEE--1979.
Harris Semiconductor Linear Products data book, 1986, pp. 10-178.
Article in Electronics Design News entitled "Composite Amplifiers Yield High Speed and Low Offset", Jim Williams; Jan. 22, 1987; pp. 4-21 and 4-22 from a 1982 Data-Acquisition Databook from Analog Devices.

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