High speed latching comparator using devices with negative imped

Details High speed latching comparator using devices with negative imped High speed latching comparator using devices with negative imped

1991-03-19

1992-08-18

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307286, 307322, 307494, 307502, 307530, H03K 524, H03K 3315

Patent

active

051401886

ABSTRACT:
A latching comparator circuit employs latching devices having a region of negative impedance separating regions of higher and lower positive impedance, such as resonant tunnel diodes, to significantly increase operating speed. The latching devices are biased so that one of them is triggered into its higher voltage region of positive impedance when a latching operation is desired, and the other is held in its lower voltage region of positive impedance. Hysteresis elements drive the triggered device to a lower voltage level within its higher voltage region, while a cross-coupling circuit between the latching devices holds the non-triggered device in its lower voltage region below its trigger level, thus assuring circuit stability.

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