Patent ID: 7944280
Filing Date: 2011-05-17
Classification: G05F

Abstract:
1. A circuit for providing a bandgap voltage comprising: a classic bandgap reference voltage generation circuit, the classic bandgap reference generation circuit including first end second serially connected transistors acting as a current mirror to another portion of the classical bandgap reference circuit and being coupled between a supply voltage V a current trimming circuit coupled in parallel with the classical bandgap reference generation circuit, the current trimming circuit including a fixed element portion including a plurality of transistors and a switch portion including a plurality of switches, wherein in each of the plurality of transistors is coupled to the supply voltage V wherein the plurality of switches includes a first switch, a second switch and a third switch and wherein the first switch is a normally closed switch, the second switch is a normally open switch and the third switch is a normally open switch, and wherein each switch includes: wherein the plurality of transistors includes a first transistor, a second transistor and a third transistor, wherein a width of the first transistor is less than a width of the second transistor and the width of the second transistor is less than a width of the third switch transistor.