A Linearly Compensated Bandgap Reference Circuits
Hongyi Wang · Microelectronics & Computer · 2007
A bandgap voltage reference is presented with a piecewise linearly compensating circuit in order to reduce the temperature coefficient greatly. With only two compensating stage, the temperature coefficient of a conventional bandgap reference falls down from 15ppm/℃ to 2ppm/℃ over the -40℃ to 120℃ temperature range. If more stages of compensating stages are added to the circuit, the temperature coefficient can be further decreased. The compensating circuit is simple and independent on the process.