Amplifier circuit with two-terminal synthesis resistor as feedback resistor

Abstract

An amplifier circuit includes a first operational amplifier (op amp) and a two-terminal synthesis resistor connected across a non-inverting input of the first op amp and an output of the first op amp. The two-terminal synthesis resistor includes a second op amp. The two-terminal synthesis resistor includes a current mirror having a first transistor, a second transistor, and a common node connected to the first transistor, the second transistor, and an output of the second op amp. The two-terminal synthesis resistor includes a resistor having a first side configured to be a first terminal of the two-terminal synthesis resistor, and a second side connected to an inverting input of the second op amp, and the first transistor. The two-terminal synthesis resistor includes a second terminal of the two-terminal synthesis resistor connected to the second transistor, and a non-inverting input of the second op amp.

Dependencies are inferred from the claim text.