Phase correcting circuit

Abstract

Abstract A PHASE CORRECTING CIRCUIT FOR A PULSE GENERATOR TO BRING IT INTO SYNCHRONISM WITH A SERIES OF SQUARE WAVE DATA SIGNALS, SUCH AS AN INCOMING TELEGRAPH OVER RADIO (TOR) SIGNAL AT A REMOTE RECEIVING STATION, WHEREIN A SAW TOOTH WAVE OF 2N+1 NEGATIVE AND POSITIVE POTENTIAL STEPS, FROM A NEGATIVE TROUGH OF N NEGATIVE POTENTIAL STEPS TO A POSITIVE PEAK OF N POSITIVE POTENTIAL STEPS, WITH A QUICK REVERSAL TO THE NEXT NEGATIVE TROUGH, IS PRODUCED FROM THE GENERATOR, WHICH SAW TOOTH WAVE HAS PEAKS HAVING THE SAME FREQUENCY AS THE DATA SIGNAL. THE STEPS OF THIS SAW TOOTH WAVE ARE THEN ACCURATELY COMPARED WITH THE LEADING AND TRAILING EDGES OF THE SQUARE WAVE DATA SIGNAL TO DETERMINE THE EXACT POSITIVE OR NEGATIVE POTENTIAL, IF ANY, OF THE STEPS AT THE TIME OF COMPARISON OF SAID EDGES. IF THE POTENTIAL AT THESE EDGES IS ZERO THEN THE PEAKS OF THIS SAW TOOTH WAVE ARE IN PERFECT SYNCHRONISM WITH THE CENTERS OF THE SQUARE WAVE PULSES OF THE DATA SIGNAL. IF THERE IS A POSITIVE OR NEGATIVE POTENTIAL AT THESE EDGE TIMES, THEN THESE POTENTIALS ARE ADDED UNTIL A PREDETERMINED NUMBER N OF POSITIVE OR A PREDETERMINED NUMBER N OF NEGATIVE POTENTIAL INCREMENTS ARE REACHED AT WHICH TIME A STEP IS SUBSTRACTED OR ADDED TO, RESPECTIVELY, THE STEPS COMPOSING THE SAW TOOTH WAVE TO ADVANCE OR RETARD. RESPECTIVELY, THE PHASE OF ITS PEAKES WITH RESPECT TO THE CENTERS OF THE SQUARE PULSES OF THE DATA SIGNAL, TO MOVE SAID SAW TOOTH PEAKS MORE INTO SYNCHRONISM WITH SAID DATA SIGNAL.

Inventors

• 👤 Wilhelm Fredrik Brok

Bibliographic Details