Patent ID: 7944280

Claim:
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 dd and an output resistor; and 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 dd and to a one of the plurality of switches and wherein each switch includes a fuse, 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: a resistor having a first end and a second end, the second end connected to ground; a fuse having a first and second end, wherein the first end of the fuse is coupled to the first end of the resistor; an inverter having an input and an output, wherein the input is coupled to the first end of the resistor; a pass transistor having a gate and a drain, wherein the gate is coupled to the first end of the resistor; a switch transistor having a gate, a drain, and a source, wherein the gate is couple to the drain of the pass transistor, the source is couples to one of the plurality of transistors, and the drain is coupled to the output resistor; 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.