Time limited digital oscillator

Abstract

A circuit for providing an oscillatory driving signal from the point in time when power is supplied to a predetermined point in time thereafter. A force balance transducer having a pick-off device with a stationary member and a moving member mechanically mounted for movement relative to the stationary member is disposed to sense a predetermined physical quantity and to produce an output relative thereto. A force producing device is coupled to the moving member for receiving the output and for driving the moving member to a predetermined neutral position. The transducer is actuated by a source of electrical power and contains a gating circuit, an astable multi-vibrator and a coupling circuit. The gating circuit is actuated by initial application of the electrical power to the transducer and actuates the astable multivibrator for a predetermined period of time. The coupling circuit couples the output from the astable multi-vibrator to the force producing device for initially driving the moving member to remove static friction and thereby remove initial erros due to static friction in the pick-off device within the predetermined time period after initial application of power.