Voltage comparator

Details Voltage comparator Voltage comparator

1986-01-03

1987-05-12

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307491, 307530, H03K 524, H03K 5153

Patent

active

046653260

ABSTRACT:
A voltage comparator for an analog to digital converter is provided which includes several differential amplifier stages connected in cascade that determine the existence of a voltage difference between the two input signals and amplify this voltage difference successively. The comparator further includes offset correction voltage circuits which are connected to each differential amplifier stage and allow for the correction of errors caused by the mismatching of the devices internal to each of the differntial amplifier stages.

REFERENCES:
patent: 4048574 (1977-09-01), Barbier et al.
patent: 4375039 (1983-02-01), Yamauchi
P. R. Gray et al., "All-MOS Analog-Digital Conversion Techniques", IEEE Trans. on Circuits and Systems, vol. CAS-25, No. 7, Jul. 1978, pp. 482-489.
B. M. Gordon, "Linear Electronic Analog/Digital Conversion Architectures, Their Origins, Parameters, Limitations, and Applications", IEEE Trans, on Circuits and Systems, vol. CAS-25, No. 7, Jul. 1978, pp. 391-418.
J. L. McCleary et al., "All-MOS Charge Redistribution Analog-to-Digital Conversion Techniques-Part 1", IEEE Journal of Solid-State Circuits, vol. SC-10, No. 6, Dec. 1975, pp. 371-379.
Z. G. Boyacigiller et al., "An Error-Correcting 14b/20 MS CMOS A/D Converter", 1981, IEEE International Solid-State Circuits Conf. Digest of Technical Papers, Feb. 18, 1981, pp. 62-63.
B. Fotouhi et al., "An NMOS 12b Monotonic 25 MS A/D Converter", 1979 IEEE ISSCC Digest of Technical Papers Feb. 15, 1979, pp. 186-187.

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