Programmable delay circuit having n-stage capacitance elements

Details Programmable delay circuit having n-stage capacitance elements Programmable delay circuit having n-stage capacitance elements

1992-02-21

1992-12-29

James, Andrew J.

Electrical transmission or interconnection systems

With nonswitching means responsive to external nonelectrical...

Temperature responsive

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

Patent

active

051754541

ABSTRACT:
A programmable delay circuit comprising input terminals supplied with input signals to be delayed; output terminals for delivering the delayed signals therefrom; resistance elements inserted between the input terminals and the output terminals; n-stage capacitance elements having capacitance values of C, ZC, 4C . . . 2.sup.n-1 C respectively (where C is a unit capacitance value) and each connected at one end thereof to the output ends of the resistance elements; and n-stage selection means for selectively applyign to the other ends of the n-stage capacitance elements either a signal having an opposite-phase or in-phase relation to the input signal, or a reference potential level. The delay circuit is capable of performing a control operation relative to any short delay time on the order of picosecond and still ensuring satisfactory linearity in the delay characteristics.

REFERENCES:
patent: 4797586 (1989-01-01), Traa
patent: 4866314 (1989-09-01), Traa
patent: 5006738 (1991-04-01), Usuki et al.
patent: 5063311 (1991-11-01), Swapp

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