High speed differential comparator

Details High speed differential comparator High speed differential comparator

1993-02-17

1994-07-12

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307355, 307491, H03K 524, H03K 302

Patent

active

053291875

ABSTRACT:
This invention relates to a capacitive switching network for producing signals of opposite polarity. In one embodiment of the invention, a first signal (V1) is applied to the first plate of a first capacitor (C1) and a second signal (V2) is applied to the first plate of a second capacitor (C2). The first plates of the first and second capacitors are then shorted together to produce a combined voltage (Vc). The generation of Vc causes an AC voltage equal to (Vc-V1) to be produced at the second plate of C1 and an AC voltage equal to (Vc-V2) to be produced at the second plate of C2. By way of example, for C1 equal to C2, there is produced a Vc equal to (V1+V2)/2. Furthermore, if V1 is greater than V2, a negative going AC signal equal to (VC-V1) is produced at the second plate of C1, and a positive going AC signal equal to (Vc-V2) is produced at the second plate of C2. The capacitive network of the invention is highly suited for use in high speed differential comparators.

REFERENCES:
patent: 3849673 (1974-11-01), Koo
patent: 4162539 (1979-07-01), Hebenstreit
patent: 4511810 (1985-04-01), Yukawa
patent: 4604534 (1986-08-01), Pricer
patent: 4965468 (1990-10-01), Nicollini et al.
patent: 5032744 (1991-07-01), Liu

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