| 摘要 |
<p>A programmable number of pulses N, of one or more auxiliary frequencies fa, is inserted between pulses of the frequency f1 to be processed. The resulting frequency N.f1, where N is a positive number (N can be fractional), is at any moment proportional to input frequency f1 where N, the proportionality factor, varies at will and can assume any positive number value. Pulse insertion results in a frequency shift of positive or negative value and succeeds continuously and without any information loss i.e. the pulse train has not to be interrupted and is processed "on (the) line". The same method described used for higher frequencies eliminates the known +/-1 count problem as it can register fractions of a pulse.</p> |
