Motorola Corporation

Douglas W Nickerson

James A Miller

Dominic J DiGianfilippo

A power supply circuitry including an input DC voltage source, a DC to DC up converter for converting the input DC voltage to an output DC voltage of greater magnitude and means for enabling the up converter to change the magnitude of the output DC voltage. The output voltage is further smoothed and filtered by a DC to DC series regulator.

Power supply circuitry

A circuit for disabling, or shutting down, the transmitter of a mobile telephone unit when the unit is not connected to another party is disclosed. When such a 'wild' mobile is sensed, a sequence of idle and seize audio tones are sent and transitions therebetween are counted. When a specific number of counts are counted a disable signal is developed. The counter is continually reset and does not count when the handset is on hook. When the handset is off hook and the mobile is talking to a party voice falsing of the counter is prevented by a timer circuit.

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East Dundee, IL, United States of America

Douglas W Nickerson