CMOS voltage reference

Details CMOS voltage reference CMOS voltage reference

1989-09-26

1990-06-05

Salce, Patrick R.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323314, 3072961, G05F 330

Patent

active

049317180

ABSTRACT:
A circuit configuration in complementary MOS technology for generating a reference voltage independent of temperature with the aid of a bandgap circuit includes first and second bipolar transistors having first and second base-to-emitter threshold voltages and interconnected base connections, and first and second field effect transistors. A first series circuit includes the output circuit of the first bipolar transistor, a first resistor being connected to the first bipolar transistor and defining a first connecting point therebetween, and the output circuit of the first field effect transistor being connected between terminals of a supply voltage source. A second series circuit which is parallel to the first includes the output circuit of the second bipolar transistor, series-connected second and third resistors defining a second connecting point therebetween, and the output circuit of the second field effect transistor. An operational amplifier has inputs connected to the first and second connecting points and an output controlling the field effect transistors. A bandgap circuit has an output at the drain connection of the second field effect transistor being fed back to the base connections of the bipolar transistors.

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patent: 4797577 (1989-01-01), Hing
patent: 4857823 (1989-08-01), Bitting

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