Arrangement for checking the synchronisation of a receiver

Details Arrangement for checking the synchronisation of a receiver Arrangement for checking the synchronisation of a receiver

H - Electricity

04

L

340/205, 340/78

H04L 1/00 (2006.01) H04L 7/00 (2006.01) H04L 7/027 (2006.01)

Patent

CA 1176728

24.4.81 PHB 32776 ABSTRACT "ARRANGEMENT FOR CHECKING THE SYNCHRONISATION OF A RECEIVER" When frequency division is used as part of the clock signal regeneration process from a received data signal, a phase ambiguity may occur. A data signal receiver for a bi-phase modulated signal comprises a filter 1 feeding a sampling switch 2 which feeds a polarity detector 3 from which the decoded data is reproduced. The phase of the sampling switch 2 is controlled by the output 6-Q of a ? 2 frequency divider 6 which is driven by a phase-locked loop 5 which in turn is driven by a zero-crossing detector 4 at twice the bit frequency. A monitoring arrangement 8 has sampling switches 10 and 11 driven by outputs 6-Q and 6-Q of the frequency divider 6. The data signal applied through a full-wave rectifier 9, is sampled at instants to and t1, at twice the bit frequency. The outputs of the sample switches 10 and 11 are fed to minimum voltage detectors 12 and 13 which detect the minimum value of the samples over a number of cycles of the input and apply this value to the inputs of a comparator 14. If the output of detector 12 is more positive than that of detector 13 the receiver is correctly synchronised but if the output of detector 13 becomes more positive than that of the detector 12 the output of the comparator changes state and causes a pulse to be applied to input 6-1 of the divider to change the phase of the divider output 6-Q. (Figure 3).

400123

Affiliated with

Also associated with

Rating

Arrangement for checking the synchronisation of a receiver does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Arrangement for checking the synchronisation of a receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arrangement for checking the synchronisation of a receiver will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1287821