Patent ID: 7064602

Claim:
An integrated circuit comprising: a. a power-supply pad adapted to receive a first power-supply voltage; b. a power-supply branch extending from the pad; c. an amplifier including: i. a local power-supply node connected to the power-supply pad via the power-supply branch; and ii. an adjustable current source drawing a supply current from the power-supply pad to the local power-supply node via the power-supply branch, wherein the local power-supply node exhibits a second power-supply voltage less than the first power-supply voltage; and d. a gain compensation circuit having a first input terminal coupled to the local power-supply node, a second input terminal coupled to a reference node, and an output terminal coupled to the adjustable current source; e. wherein the gain compensation circuit controls the supply current in response to changes in the second power-supply voltage; and f. a reference branch, independent of the power-supply branch, coupled between the pad and the reference node.