Patent ID: 6184665
Filing Date: 2001-02-06
Classification: H02P

Abstract:
An integrated current mode switching drive system for an external load, comprising:a differential error amplifier having a first input connected to a first control voltage and a second input connected to a reference voltage;a first resistor connected to the first input of said differential error amplifier and receiving a second control signal;a second resistor connected to the first input of said differential error amplifier and receiving a third control signal;a third resistor connected in series with the external load;a current sense amplifier circuit having an input connected across the third resistor and an output generating the third control signal, said current sense amplifier circuit comprisinga switched capacitor stage comprising an operational amplifier, a plurality of switches and capacitors connected to said operational amplifier so that said operational amplifier is configured alternately as a buffer and charge transfer circuit responsive to a pair of complementary control signals applied to said switches, anda sample and hold circuit having an input connected to an output of the switched capacitor stage and having an output generating the third control signal.