Comparator circuit

Details Comparator circuit Comparator circuit

1990-06-22

1991-01-29

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307315, 307362, 307491, 307494, H03K 5153, H03K 524, H03K 508

Patent

active

049888951

ABSTRACT:
A novel comparator circuit is disclosed, in which a pulse output is obtained from the output terminal of a differential amplifier through a transistor by applying a threshold voltage to either input terminal of a differential amplifier composed of a pair of transistors and then comparing an input voltage applied to the other input terminal therewith, wherein the aforementioned pair of transistors of the differential amplifier are each composed of two transistors connected in a complex manner, the input voltage is directly inputted, without the use of a buffer or the like, by raising the input impedance of the comparator circuit to thereby simplify the circuit as a whole and to widen its scope of application. Further, the output terminal of the differential amplifier connected to a transistor in an output circuit of the comparator circuit and a power source are connected through a resistor so as to ensure against occurrence of impulses in the output pulses through prevention of operation of the output circuit alone before changing of the threshold voltage for causing a hysteresis property to be imparted to the comparator circuit.

REFERENCES:
patent: 3628059 (1971-12-01), Niu
patent: 3879662 (1975-04-01), Barneck

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