Frequency converter for multiplex system using pulse-stuffing.

摘要

The stuffing pulse and stuffing designation pulse which indicates presence or absence of a stuffing pulse are inserted in order to convert an input signal frequency to a higher frequency.
<??>In the present invention, the frame synchronization pulse is also used in common as the stuffing designation pulse. Therefore the stuffing designation can be done even where the frequency difference between the input signal frequency and output signal frequency is small.