Transconductance amplifier having sensfets which drive a load wi

Details Transconductance amplifier having sensfets which drive a load wi Transconductance amplifier having sensfets which drive a load wi

1991-07-25

1993-03-02

Mullins, James B.

Amplifiers

Wheatstone bridge with amplifier in at least one arm

330277, 330293, 360 7812, H03F 134

Patent

active

051912970

ABSTRACT:
A transconductance amplifier has sensfets connected to an H bridge configuration to drive a load with current which is linearly proportional to the input signal. A inverting or a non-inverting side is active depending upon whether the signal is above or below a reference. Three stages include power amplifiers, switches and comparators for turning the two sides on and off. A mirror current source for each sensfet provides feedback to maintain the linearity of the load current as a function of input signal, thus eliminating the need for a resistor in the current path for sensing the feedback.

REFERENCES:
patent: 4439800 (1984-03-01), Powell
patent: 4620252 (1986-10-01), Bauck et al.
patent: 4885517 (1989-12-01), Pennock
patent: 4905151 (1990-02-01), Weiman
patent: 4962453 (1990-10-01), Pong
patent: 4967862 (1990-11-01), Pong
patent: 4992672 (1991-02-01), Norton
patent: 5001398 (1991-03-01), Dunn
"Coupled Compensator", IBM Technical Disclosure Bulletin, vol. 33, No. 5, Oct. 1990, pp. 363-364.
Power IC Drives Motors from Logic Level PWM, Dec. 1988 pp. 111-113.
Current Sensing Simplifies Motor Control Design, Nov. 10, 1988, pp. 119-126.
Power ICs, Better Packing, More Brains and Brawn, Jun. 23, 1988, pp. 85-88.
Integral Sensing for Simpler Current Limiting, Jun. 23, 1988, pp. 100-105.
Lossless Current Sensing with Sensefets Enhances Motor Drive Design, Apr., 1986, pp. 30-34.

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