Title:
【発明の名称】オートチューニング装置
Document Type and Number:
Japanese Patent JP2625759
Kind Code:
B2
Abstract:
An auto tuning apparatus sequentially varies the value of N, a positive integer, in the frequency-dividing ratio 1/N of a variable frequency-dividing circuit incorporated in a local oscillating circuit having a phase locked loop configuration. The apparatus detects a plurality of candidate tuning points of an intermediate frequency carrier and includes a circuit for performing a scan of those tuning points by, among other steps, changing a tuning point detecting threshold relative to the level of the received signal. A circuit is provided for determining the correct or optimum tuning point on the basis of the scan.
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| JPS5758410 | AGC CIRCUIT DEVICE |
Inventors:
Yanagori Masami
Application Number:
JP23825487A
Publication Date:
July 02, 1997
Filing Date:
September 22, 1987
Export Citation:
Assignee:
ソニー株式会社
International Classes:
H03J7/18; H03J1/00; (IPC1-7): H03J7/18
Domestic Patent References:
| JP56122222A | ||||
| JP579124A |
Attorney, Agent or Firm:
Hidekuma Matsukuma