Complementary voltage comparator

Details Complementary voltage comparator Complementary voltage comparator

1988-08-23

1989-09-19

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307491, 307494, 330295, H03K 524

Patent

active

048684171

ABSTRACT:
A complementary voltage comparator is described wherein a CMOS operational amplifier having an input stage comprising N-channel field effect transistors is coupled with a CMOS operational amplifier having an input stage comprising P-channel field effect transistors. The outputs of the operational amplifiers are converted to currents and combined to indicate the relative magnitudes of the voltages being compared. This configuration allows the range of input voltages to vary over the full range of supply voltages and negates the need for offset correction.

REFERENCES:
patent: 4228366 (1980-10-01), Huttemann et al.
patent: 4362956 (1982-12-01), Ogasawara et al.
patent: 4795916 (1989-01-01), Liron

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