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Frequency hopping radio communications apparatus having pseudo-random _channel selection

  • US 4,476,566 A
  • Filed: 06/08/1982
  • Issued: 10/09/1984
  • Est. Priority Date: 06/19/1981
  • Status: Expired due to Fees
First Claim
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1. Frequency hopping radio communications apparatus having selection circuitry for providing in psuedo-random order a sequence of multi-digit signals identifying n channels selected from N possible channels comprising a first counter responsive to clock signals to provide a series of multi-digit signals identifying each of the N possible channels, electronic latching means the input of which receives the multi-digit signals from said first counter and which is arranged to provide a multi-digit signal at its output corresponding to the multi-digit signal present at its input each time the latching means is enabled, a store which is addressed by said multi-digit signals from said first counter and which is arranged to provide a first signal whenever said multi-digit signals from said first counter identify one of the n channels, and a second counter which is responsive to the first enabling signals to count the clock pulses supplied to said first counter and which is arranged on reaching a predetermined value of the count to provide a second enabling signal to the latching means to latch its output to the multi-digit signal then present at its input.

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