Patent ID: 8072242
Filing Date: 2011-12-06
Classification: H03K

Abstract:
1. An apparatus; comprising: an output driver comprising: logic circuitry coupled to the output driver, the logic circuitry including one or more circuit elements arranged to enable the logic circuitry to be programmable to apply either: the output driver is a first output driver; the apparatus further comprises a second output driver comprising a fourth PMOS transistor having a source node coupled to the supply voltage; the logic circuitry is coupled to the second output driver; the logic circuitry is further programmable to selectively apply the predetermined reference voltage to a gate of the fourth PMOS transistor to operate the apparatus in the voltage-drive mode; and the logic circuit is further programmable to selectively apply the bias voltage to the gate of the fourth PMOS transistor to operate the apparatus in the current-drive mode.