Design of a new reference current source based on MEMS sensor
Xiang 'Anthony' Chen · Application of Electronic Technique · 2010
Based on MEMS sensor working principle,a low temperature coefficient and high power supply rejection ratio reference current source was designed for MEMS sensor system.Based on the traditional Widlar-type structure reference current source,the BJT small-signal model was analyzed,the method of increasing the loop gain to enhance the reference current source PSRR was obtained,and to reduce the temperature coefficient,a self-compensation diode-loop increasing the current reference curvature compensation was designed.