Bipolar H write driver

Details Bipolar H write driver Bipolar H write driver

1992-12-15

1994-03-01

Wambach, Margaret R.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072966, 3072967, 307315, 307570, H03K 1760, H03K 301

Patent

active

052910695

ABSTRACT:
An improved driver design including a plurality of NPN bipolar driver transistors connected in an H configuration including at least one bipolar upper drive transistor. A novel circuit is included for driving the upper NPN bipolar driver transistor. In a particular implementation, the circuit for driving the upper bipolar drive transistor is adapted to sense the output of the drive transistor and regulate a voltage at the input thereof in response thereto to keep the drive transistor out of saturation. Thus, power dissipation is minimized by using an H configuration and high speed is afforded by using bipolar drive transistors and by keeping the drive transistors out of saturation.

REFERENCES:
patent: 4146801 (1979-03-01), Vali et al.
patent: 4496849 (1985-01-01), Kotowski
patent: 4551772 (1985-11-01), Sliger
patent: 4639794 (1987-01-01), Ferrier
patent: 4701635 (1987-10-01), Kawazoe et al.
patent: 4777386 (1988-10-01), Majumdar
patent: 4985666 (1991-01-01), Nakabayashi
patent: 5059824 (1991-10-01), Ueno
IBM TDB, vol. 16 No. 8 Jan., 1974 Power Amplifier Providing Low-Power Dissipation in a Variable Speed Reel-To-Reel Tape Transport pp. 2621-2623.
IBM TDB vol. 23, No. 11 Apr. 1981 "Predriver For H Configured Write Driver For Magnetic Recording" pp. 5167-5168.

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