Patent ID: 8536894
Filing Date: 2013-09-17
Classification: H03K

Abstract:
1. An integrated circuit for an output interface, comprising: a comparator to compare a reference voltage and a regulated voltage to provide a comparison output; a state machine coupled to the comparator to increment or decrement a resistance setting output of the state machine responsive to the comparison output; a reference single-ended driver including a pull-up portion and a pull-down portion, the reference single-ended driver being coupled to receive the resistance setting output from the state machine; and an output node of the reference single-ended driver coupled to a reference node from which the reference voltage is input to the comparator as a feedback voltage; wherein transistors of the reference single-ended driver are set to be in either at least a substantially conductive state or at least a substantially non-conductive state responsive to the resistance setting output to provide an internal source termination resistance as a reference resistance.