Pulse-width modulation drive circuit

Details Pulse-width modulation drive circuit Pulse-width modulation drive circuit

1986-07-02

1989-04-18

Shoop, Jr., William M.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318599, 318317, 318257, 31845B, H02P 500

Patent

active

048230561

ABSTRACT:
A pulse-width modulation drive circuit for a load such as a motor, particularly, a motor used in a compact disc player or the like, in which losses in diodes used to absorb reverse EMF are substantially eliminated. For this purpose, the pulse widths of pulse signals used to on-off control drive current flow through the load are controlled so as to eliminate the diode losses. The circuits of the various embodiments of the invention are designed so as to be easily implemented in integrated circuit form.

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