US 2015/0084686 A1 · COMPENSATED VOLTAGE REFERENCE GENERATION CIRCUIT AND METHOD

Abstract

In accordance with an embodiment, a method of compensating for the temperature coefficient of a reference voltage includes generating a reference voltage that varies over temperature. A temperature compensated reference voltage is generated that compensates for a temperature variation in the voltage value of the reference voltage. In accordance with another embodiment, a temperature compensation circuit that compensates for temperature variation of a reference voltage is includes a reference voltage generator circuit having an output. A first impedance branch is coupled to the output of the reference voltage generator circuit and a second impedance branch is coupled to the output of the reference voltage generator circuit. A transconductance generation circuit having a first terminal connected to the first impedance branch and a second terminal connected to the second impedance branch.

Claims25

Dependent claims

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 impedance element;
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 in response to the first voltage and the second voltage.

1 more element

A temperature compensation circuit that compensates for temperature variation of a reference voltage, comprising:

a first impedance branch coupled for receiving a reference voltage;
a second impedance branch coupled for receiving the reference voltage;
and
a transconductance generation circuit having a first input, a second input, and an output, the first input coupled to the first impedance branch and the second input coupled to the second impedance branch.

1 more element

Dependencies are inferred from the claim text.

Compensated voltage reference generation circuit and method

Life of this patent

Compensated voltage reference generation circuit and method

Life of this patent

Abstract

Claims25