| 摘要 |
A stable, low noise, low output impedance CMOS reference voltage circuit includes a CMOS/bipolar band gap circuit producing a reference voltage on the source of a source follower transistor driven by an output of a CMOS differential amplifier which maintains a VTHERMAL voltage across the bases of a pair of emitter follower transistors driving the inputs of the CMOS differential amplifier. A power supply noise rejection circuit includes a cascode MOSFET coupling the drain of the source follower output transistor to a positive power supply voltage conductor. A current mirror circuit greatly attenuates any power supply voltage perturbations before they reach the gate of the cascode MOSFET. A unity gain buffer includes a CMOS differential amplifier input stage with one input coupled to the output of the source follower transistor and an output driving a CMOS operational transconductance amplifier. |
