US 2020/0050231 A1 · REFERENCE CURRENT SOURCE AND SEMICONDUCTOR DEVICE

Abstract

A first transistor and a second transistor have control terminals coupled to each other. A current mirror circuit supplies a current having the same amount as that of a current Iref flowing through a first path including the second transistor to a second path including the first transistor and supplies a current having a predetermined number of times m of a current amount of the current Iref of the first path to a third path separate from the second path. The third transistor and a fourth transistor are provided on the third path. The third transistor has a source coupled to one end of the first transistor, and the fourth transistor has a gate coupled to a gate of the third transistor. A resistor is provided between a source of the fourth transistor and one end of the second transistor.

Claims11

Dependent claims

A reference current source comprising:

a first transistor and a second transistor having control terminals coupled to each other;
a current mirror circuit structured to supply a current having the same amount as that of a current flowing through a first path including the second transistor to a second path including the first transistor and supply a current having a predetermined number of times of a current amount of the current of the first path to a third path separate from the second path;
a third transistor which is provided on the third path and has a source coupled to one end of the first transistor;
a fourth transistor which is provided on a low potential side from the third transistor on the third path and has a gate coupled commonly with a gate of the third transistor;
and
a resistor which is provided between a source of the fourth transistor and one end of the second transistor.

3 more elements

Dependencies are inferred from the claim text.

Reference current source and semiconductor device

Life of this patent

Reference current source and semiconductor device

Life of this patent

Abstract

Claims11