Drive circuits for a piezoelectric stack

Details Drive circuits for a piezoelectric stack Drive circuits for a piezoelectric stack

1977-02-04

1978-08-22

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4110

Patent

active

041091744

ABSTRACT:
A drive circuit for a piezo-electric crystal stack comprises an inductor, a first circuit including a diode and a transistor through which the inductor can be connected to a pair of d.c. supply terminals, the first circuit including a switch operable to reduce the current flow through the inductor, a second curcuit including a diode through which energy from the inductor is transferred to the stack of crystals when the current flow through the inductor is reduced. The drive circuit also includes means for transferring energy from the stack of crystals to the inductor when it is required to increase current flow in the inductor.

REFERENCES:
patent: 2398701 (1946-04-01), Firestone
patent: 3100886 (1963-08-01), Marks
patent: 3524082 (1970-08-01), Mettler
patent: 3872330 (1975-03-01), Miler et al.

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