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US 4,791,345 AGranted
Driving device for a stepping motor
AssigneeLGZ Landis & Gyr Zug AG
InventorPierre Boillat
Life of this patent
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Abstract
A driving device for controlling the driving frequency for a stepping motor includes a voltage control pulse generator for producing electrical pulses for driving the stepping motor. The pulse generator includes an RC network providing a time base for the pulse width and the operating frequency of the electrical pulses. The RC network includes at least one controllable resistance and a capacitor connected to control the controllable resistance by the charging and discharging of the capacitor.
Claims11
A driving device for controlling the drive frequency for a stepping motor, comprising
- a voltage controlled pulse generator for producing electrical pulses having a pulse width and an operating frequency for driving said stepping motor;
- said pulse generator comprising an RC network providing a time base for the pulse width and the operating frequency of said electrical pulses;
- said RC network comprising at least one controllable resistance and a first capacitor;
- and
- a second capacitor coupled to said controllable resistance;
- said controllable resistance being controlled by the charging and discharging of said second capacitor.
3 more elements
Dependencies are inferred from the claim text.