Scanning system having low quiescent current scanning mirror mot

Details Scanning system having low quiescent current scanning mirror mot Scanning system having low quiescent current scanning mirror mot

1989-07-28

1991-05-07

Levy, Stuart S.

Registers

Coded record sensors

Particular sensor structure

235470, 235472, 318138, 318254, H02K 2908

Patent

active

050138995

ABSTRACT:
A microprocessor-controlled scanning system having a scanning element which is driven by a three-phase DC motor has low quiescent current motor driver circuitry. A bus driver chip normally used to drive a computer memory bus is novelly used in place of a prior art triple half-bridge circuit to source and sink the drive windings of the motor, thus significantly reducing the drive circuitry power requirement.

REFERENCES:
patent: 3581173 (1971-05-01), Hood
patent: 4030005 (1977-06-01), Doemen
patent: 4396875 (1983-08-01), Yamaguchi
patent: 4471280 (1984-09-01), Stack
patent: 4709195 (1987-11-01), Hellerson et al.
patent: 4734841 (1988-03-01), Elliot et al.

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