Patent ID: 7502214

Claim:
A switch driver circuit, the circuit comprising: a first output driver having an input and an output coupled to a first output pin of the circuit; a first current source having an enable input and an output coupled to the first output pin, where the first current source is configured to source current from a power supply to the output responsive to the enable input; a logic circuit having a first input for receiving a subject signal, a second input for receiving a clock signal, a third input for receiving a mode control signal, a current control output coupled to the enable input of the first current source, and a first output coupled to the input of the first output driver, where the logic circuit is configured to respond to a first state of the control mode signal by enabling the subject signal to modulate the clock signal for output to the first output of the logic circuit and disable the first current source through the current control output, and where the logic circuit is further configured to respond to a second state of the control mode signal by enabling the subject signal to control the first current source through the current control output, disable the clock signal, and output the subject signal through the first output of the logic circuit.