Patent ID: 9568928
Date: 2017-02-14
CPC Classifications: G05F

Claim:
1. A method of compensating for temperature variation of a reference voltage, comprising: providing a reference voltage, wherein a voltage value of the reference voltage varies over temperature; applying the reference voltage to a first impedance network and to a second impedance network, wherein the first impedance network includes a first impedance element with a first temperature coefficient and the second impedance network includes a second impedance element having a second temperature coefficient, the second temperature coefficient different from the first temperature coefficient, and wherein the first impedance network includes a first node coupled to a first input of a transconductance circuit, and the second impedance network includes a second node and a terminal, the second node coupled to a second input of a transconductance circuit and the terminal coupled to an output of the transconductance circuit; generating a first voltage and a second voltage in response to the reference voltage applied to the first impedance network and to the second impedance network; generating a compensation signal at the output of the transconductance amplifier in response to the first voltage and the second voltage.