Rate converter for digital signals having a negative feedback ph

Details Rate converter for digital signals having a negative feedback ph Rate converter for digital signals having a negative feedback ph

1976-05-20

1978-03-14

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

179 15AF, G06F 506

Patent

active

040793710

ABSTRACT:
An arrangement responsive to input digital signals for producing output digital signals at a higher rate together with stuffing pulses comprises a first frequency divider responsive to input clock pulses defining the rate of the input signals for producing write-in pulses for storing the input digital signals in a memory. A voltage controlled oscillator produces output clock pulses at the higher rate, which pulses are supplied directly and through a circuit responsive to the output clock pulses for supplying stuffing-pulse-position specifying pulses to a second frequency divider for producing read-out pulses for making the memory produce the output signals. A controller responsive to the input clock, output clock, and position specifying pulses and coupled to the first and second frequency dividers establishes a difference in phase between the write-in and read-out pulses which lies in a range wherein a phase lock loop means responsive to the phase difference for controlling the oscillator always carries out negative feedback to the oscillator.

REFERENCES:
patent: 3136861 (1964-06-01), Mayo
patent: 3504287 (1970-03-01), Deregnaucourt
patent: 3663760 (1972-05-01), De Witt
patent: 3806654 (1974-04-01), Dooley
patent: 3821478 (1974-06-01), Hillman

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