Frequency synthesizer tuner

Abstract

Abstract PURPOSE: To prevent double-writing operation to a memory by sequentially making comparison between read information and write information of the content of a memory circuit by a write start signal. CONSTITUTION: When a manually-channel-selected reception station is written to the memory by the output of up-down counter 8, read circuit 13 is operated to read memory contents in sequence and digital comparator 15 makes comparison between read information and information to be written; when the both disagree, the memory address is shifted and the same operation is repeated. When information is not written to the whole memory, write circuit 14 is actuated for the first time. Therefore, the same infomation can be prevented from being written to different addresses. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Tetsuo Sato

Bibliographic Details