US Patent 7199604 Driver circuit with low power termination mode

Driver circuits and methods for operating driver circuits in automatic test equipment are provided. The driver circuit includes an output circuit operable in a dynamic mode and in a termination mode, and a mode control circuit for supplying a first current to the output circuit in the dynamic mode and for supplying a second current to the output circuit in the termination mode in response to a mode select signal. The mode control circuit may include a current multiplier and a switching circuit for switching a control current supplied to the current multiplier. In one example, the slew current supplied to the output circuit is controlled in response to the mode select signal.