Enhanced CMOS circuit to drive DC motors

Details Enhanced CMOS circuit to drive DC motors Enhanced CMOS circuit to drive DC motors

2005-11-01

2005-11-01

Tran, Anh Q. (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S082000, C326S081000

Reexamination Certificate

active

06960938

ABSTRACT:
An enhanced CMOS circuit to drive a DC motor is disclosed, in which a CMOS circuit is used to form a driver circuit of the DC motor, replacing a conventional BiCMOS for the part of the driver circuit, which is used in a portable CD player. Two switching stages are each formed by four CMOS transistors connected in series, with one end of the circuit being connected to a positive power supply with a higher voltage and another end connected to ground or negative power supply terminal. The switching stages are able to produce high output voltages, which are applied on the gates of the CMOS transistors in the driver stage to lower the driving impedance of the conduction channel and to produce sufficient output current to drive a DC motor.

REFERENCES:
patent: 5414379 (1995-05-01), Kwon
patent: 5568081 (1996-10-01), Lui et al.

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