Monolithic resistor comparator circuit

Details Monolithic resistor comparator circuit Monolithic resistor comparator circuit

1989-07-20

1991-09-24

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307310, 307355, 307360, 307362, 374170, 374183, H03K 524, G01K 716

Patent

active

050516159

ABSTRACT:
A precision resistor comparator provides for the comparison and the resistive value of a first resistor with the predetermined resistive value of a second resistor. A differential comparator and level shifter provides a digital signal indicative of the relative magnitude of the first and second resistors. Another aspect of the present invention is the provision of the second resistor on a monolithic substrate with the resistor comparator circuit. The second resistor is provided with a temperature coefficient that is substantially independent of variances in its fabrication parameters and a resistance that can be trimmed, following fabrication, with substantially no effect on the temperature coefficient of the second resistor.

REFERENCES:
patent: 3809929 (1974-05-01), Vittoz
patent: 4556330 (1985-12-01), Regtien
patent: 4650347 (1987-03-01), Shigemura et al.

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