Method and apparatus for dynamically controlling the timing of s

Details Method and apparatus for dynamically controlling the timing of s Method and apparatus for dynamically controlling the timing of s

1984-05-17

1987-06-23

Heyman, John S.

Electrical transmission or interconnection systems

With nonswitching means responsive to external nonelectrical...

Temperature responsive

307603, 307595, 307243, 328 55, 328109, 328104, H03K 386, H03K 1726

Patent

active

046755624

ABSTRACT:
Apparatus for delaying an electrical signal includes a sequence of stages, each for delaying the signal. A coarser stage delays the signal by multiples of a predetermined fundamental delay interval and a finer stage provides for fine adjustment of the delay. The fine stage includes an integral number N of delay elements, the total providing a delay interval greater than the fundamental delay interval, whereby the fine delay intervals compensate for fabrication tolerances to enable accurate calibration of the combined system by post-fabrication measurement. In one implementation each delay stage includes a tapped transmission line to provide delay intervals, in another a ramp generator is used.

REFERENCES:
patent: 3659207 (1972-04-01), Perreault
patent: 3675049 (1972-07-01), Haven
patent: 4488297 (1984-12-01), Vaid
"Analysis and Definition of Overall Timing Accuracy in VLSI Test System," 1981 IEEE Test Conference, Paper 7.5, pp. 143-153.

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