Regenerative comparators

Details Regenerative comparators Regenerative comparators

1990-07-30

1992-08-18

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307263, 307359, 307494, H03K 524, H03K 512

Patent

active

051401878

ABSTRACT:
A comparator includes a differential stage based upon transistors Q3 and Q4, the differential stage being adapted to receive via a pad an input V.sub.in, being a signal to be compared with a reference input V.sub.ref received via a second pad. The pads constitute respectively the inverting and reference inputs of the comparator. The comparator also includes an output stage being of the form of a flip-flop providing an output Q and a complementary output Q.sup.-. The circuit further includes a first current generator supplying the differential stage and a second current generator connected to a diode and a transistor intermediate the differential stage and the output stage. Current steering of the current generated by second current generator by the transistor and diode path controls the output stage as the state of the differential stage changes. The transistor forms an intermediate stage which is also part of the differential stage regenerative loop.

REFERENCES:
patent: 4406955 (1983-09-01), Lo Cascio
patent: 4439694 (1984-03-01), Fox
patent: 4642484 (1987-02-01), Skovmand et al.
patent: 4654545 (1987-03-01), Giordano
patent: 4814642 (1989-03-01), Kleks

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