Variable delay circuit for producing a delay which varies as a h

Details Variable delay circuit for producing a delay which varies as a h Variable delay circuit for producing a delay which varies as a h

1993-04-26

1994-08-02

Callahan, Timothy P.

Electrical transmission or interconnection systems

With nonswitching means responsive to external nonelectrical...

Temperature responsive

307605, 307608, 307594, 307595, 307597, 328 55, 328 66, H03K 5159

Patent

active

053348915

ABSTRACT:
The variable delay device 10 includes an ECL gate 11 associated with an adjusting circuit 23 acting on the resistance of resistive load elements 14, 15 of transistors 12, 13 and the resistive load element 18 of the current source 16 at the gate 11 to cause the current produced by the source 16 to vary linearly while keeping the voltage at the collectors of the transistors 12, 13 constant. The range of variation of the resistances is selected in such a way that the delay between the input signals IN, IN* and OUT, OUT* varies substantially linearly. The invention is particularly applicable to systems for digital data transmission at a very high rate, of more than 1 gigabit per second.

REFERENCES:
patent: 4422052 (1983-12-01), Yorkanis et al.
patent: 4709170 (1987-11-01), Li
patent: 4797586 (1989-01-01), Traa
patent: 4862020 (1989-08-01), Cowan et al.
patent: 4866314 (1989-09-01), Traa
patent: 4893036 (1990-01-01), Hester et al.

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