Memory-saving all channel digital tuning system

Abstract From the Canadian patent

A tuning system for a television receiver includes fine tune memories and tuning information memories having reference channel nominal tuning information for each frequency band and increment tuning information representing the tuning voltage differences between successive channels. Accumulator means add the reference channel tuning information and increment information to develop the nominal tuning voltage for any selected channel. Control logic, including channel number counters and latches and state counters is coupled to the, accumulator means, tuning information memories and the fine tune memories. The memories' and accumulator means' outputs are coupled to a corresponding plurality of …