Delay control circuit

Details Delay control circuit Delay control circuit

1988-01-11

1989-07-04

Miller, Stanley D.

Electrical transmission or interconnection systems

With nonswitching means responsive to external nonelectrical...

Temperature responsive

307603, 307605, 307606, 307590, 307591, 307595, 328 55, 328 56, H03K 513, H03K 5159

Patent

active

048453900

ABSTRACT:
A circuit (40) constructed in accordance with this invention includes a ring oscillator (25) to provide a signal which is dependent on the propagation delays of the inverters (33, 34, 35) comprising the ring oscillator, therefore the frequency of the ring oscillator is inversely dependent upon the propagation delays of the inverter comprising the ring oscillator. Means (37) are provided to determine the propagation delay introduced by the components in the ring oscillator by measuring the frequency of the output signal produced by the ring oscillator which provides a signal to a multiplexer (36) which selects among a number of preset delay components (26) those components which are necessary to ensure that the propagation delay caused by the circuitry (not shown) connected to the input lead (21) of the circuit constructed in accordance with this invention plus the propagation delay introduced by the selectable delay elements is nearly a constant propagation delay.

REFERENCES:
patent: 3622809 (1971-11-01), Williams
patent: 3735270 (1973-05-01), Holub
patent: 4330750 (1982-05-01), Mayor
patent: 4494021 (1985-01-01), Bell et al.
patent: 4504749 (1985-03-01), Yoshida
patent: 4539490 (1985-09-01), Ariizumi et al.
patent: 4623805 (1986-11-01), Flora et al.
patent: 4737670 (1988-04-01), Chan

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