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Variable phase lock control

  • US 4,443,767 A
  • Filed: 02/23/1981
  • Issued: 04/17/1984
  • Est. Priority Date: 03/21/1980
  • Status: Expired due to Fees
First Claim
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1. A variable phase lock control comprising:

  • (a) first storage means for digitally storing a representation of a first signal forming a substantially full cycle of a first predetermined waveform, the adresses of sequential elements of said first signal being sequential,(b) means for generating a first address signal designating the addresses of said first signal elements and addressing the first storage means sequentially and cyclically to read out the stored first signal,(c) second means for digitally storing a representation of a second signal forming a substantially full cycle of a second predetermined waveform, the addresses of sequential elements of said second signal being sequential, the number of elements of the first and second signals being similar,(d) means for generating a digital signal having a value between zero and the number of elements of said first and second signals,(e) means for adding said digital signal and the addresses of the first signal elements to provide a second address signal,(f) means for addressing the second storage means sequentially and cyclically with the second address signal to read out the stored second signal,whereby the read out first signal and the read out second signal have a phase relationship dependent on the value of the digital signal.

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