Process and circuit arrangement for digital control of the phase of scanning clock pulses

Abstract From the Canadian patent

For conversion of digital signals received in analog form, scanning samples of these digital signals are sent to a digital signal receiving unit at intervals fixed by the occurrence of the scanning clock pulses after an analog-digital conversion. The respective digital signal receiving unit then supplies the phase control signals derived from the received digital signals. After filtering these phase control signals are sent at given intervals to a clock generator for delivering the scanning clock pulses. The phase control signals are filtered in the form Ta(i) = al(Te(i) - a2 Te(i-l)) + a3 Ta(i-l) where al a2 and a3 are, filter coefficients, Ta(i) and Ta(i-l) are filtered phase control …