关键词: 基极电流补偿, 低温漂系数, 高电源抑制比

Abstract: The paper present a new kind of bandgap voltage reference source.By using base current compensation,it has a low temperature coefficient and a high PSRR.Through eliminating the transistor base current effect on the temperature coefficient of reference voltage,it effectively reduces the temperature drift coefficient of the circuit.At the same time by the using of self biased current mirror and filter capacitor,we improves the power supply rejection ratio of the circuit in full frequency.TSMC 0.18 μm process is adopted by the circuit,by the simulation result in Cadence,it shows that the temperature coefficient is 9.1×10-6/℃ and the PSRRreaches-80dBinlowfrequency.

Key words: base current compensation, low temperature coefficient, high PSRR