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Synchronizing method and apparatus

  • US 4,241,309 A
  • Filed: 10/05/1978
  • Issued: 12/23/1980
  • Est. Priority Date: 10/05/1978
  • Status: Expired due to Term
First Claim
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1. A method of developing a series of synchronizing pulses related to a series of input pulses of variable amplitude, comprising, developing a first signal having an amplitude which is proportional to the derivative of the rising or falling portion of each of of the input pulses, developing a second signal related to said first signal and having a minimum amplitude which is greater than the minimum amplitude of the first signal and having a decay characteristic slower than that of the first signal such that the amplitude of said second signal becomes equal to the amplitude of said first signal at a threshold point which is proportional to the amplitude of said first signal, and developing a series of synchronizing pulses each related to a respective threshold point, whereby the phase of the synchronizing pulses is independent of the amplitude of the input pulses.

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