US 2010/0060346 A1 · REFERENCE VOLTAGE GENERATION CIRCUIT

Abstract

According to an aspect of the present invention, there is provided a reference voltage generation circuit including: a first transistor having a first gate, a first source and a first drain; a second transistor having a second gate connected to the first gate, a second source connected to the first source and a second drain; a first diode connected between a ground and a V− node; a first resistor connected between the V− node and the first drain; a second diode and a second resistor connected between the ground and a V+ node; a third resistor connected between the V+ node and the first drain; an operational amplifier including input ports connected to the V+ node and the V− node and an output port connected to the first gate and the second gate; and a fourth resistor connected between the ground and the second drain.

Claims5

Dependent claims

A reference voltage generation circuit comprising:

a reference current generation circuit comprising:
an output terminal from which a temperature-independent current is output;
a third transistor comprising:
a third gate,
a third source, and
a third drain connected to the output terminal;
a second operational amplifier comprising:
a second plus input port connected to the output terminal,
a second minus input port connected to a power supply voltage via a variable resistor that is disposed between the power supply voltage and a ground level, and
a second output port connected to the third gate;
and
a fourth resistor connected between the output terminal and the ground level.

9 more elements

Dependencies are inferred from the claim text.

Reference voltage generation circuit

Life of this patent

Reference voltage generation circuit

Life of this patent

Abstract

Claims5