CURRENT DRIVER CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide a current output circuit for not generating switching noises due to the ON/OFF of the current of respective current drivers when a data state is changed. SOLUTION: The current output circuit 10 is provided with the current drivers 20 and 26 connected to a first and second output nodes 32 and 34 by current switches 36, 40, 44 and 46 for supplying the current I and a switchable shunt resistor 48 connected to the current drivers. The current supplied by the driver is shunted through the switchable shunt resistor 48 and the current from the driver is kept fixed and does not contribute to a net load current. For the current switch, in a first data state, the current supplied by the current driver is made to flow from the first output node 32 to the second output node 34 and the current I is supplied to a connected load 50. In a second data state, the current is made to flow from the second output node 34 to the first output node 32 and the current -I is supplied to the load 50.