KEY-LESS ENTRY RECEIVER

Title:

KEY-LESS ENTRY RECEIVER

Document Type and Number:

Japanese Patent JP2000054700

Kind Code:

A

Abstract:

To provide a receiver for a key-less entry control system at a low cost and in a precisely tuning structure.

A receiver 1 constructed of a super heterodyne type includes a sweeping means 2b for controlling a local oscillator 104 to sweep its oscillation frequency within a preset range, a received signal intensity detecting means 111 for detecting the intensity of a received signal and a sweep control means 2a for controlling the sweeping means 2b. The sweep control means 2a is formed in a structure of detecting a received wave signal in accordance with the intensity of the received signal and stopping sweeping of the oscillation frequency, so that a transmitter 4a and the local oscillator 104 with vibrators 4031, 1041, if not so stable and inexpensive, can be surely tuned and an error in detection can be prevented by prohibiting sweeping stop during reverse sweeping leading to unstable intensity of the received signal.

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Inventors:

NAOI TAKASHI
ASAKURA FUMIO
KATSUTA YOSHINORI
UCHIDA AKIRA

Application Number:

JP23798398A

Publication Date:

February 22, 2000

Filing Date:

August 10, 1998

Export Citation:

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Assignee:

NIPPON SOKEN
DENSO CORP

International Classes:

B60R25/01; B60R25/24; H04B5/02; E05B49/00; (IPC1-7): E05B49/00; B60R25/00; H04B5/02

Attorney, Agent or Firm:

Ito Juma

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