IMPEDANCE CONTROL CIRCUIT

摘要

Briefly, in accordance with one embodiment of the invention an integrated circuit includes: a digital feedback control circuit (310, 360) to adjust the impedance of an interface circuit output buffer (320) based, at least in part, on having adjusted the impedance of a non-data signal output buffer (330) coupled to an external impedance (350, 370). Briefly, in accordance with another embodiment of the invention, a method of digitally adjusting the impedance (310) of an interface circuit output buffer (320) comprises: digitally adjusting the impedance of a non-data signal output buffer (330) coupled to an external impedance (350, 370), and digitally adjusting the impedance of the interface circuit output buffer (320) based, at least in part, on the digitally adjusted impedance of the non-data signal output buffer (330).