Title:
START-UP METHOD FOR MOBILE COMMUNICATION EQUIPMENT, MOBILE COMMUNICATION EQUIPMENT AND STATIONARY COMMUNICATION EQUIPMENT
Document Type and Number:
Japanese Patent JP3237405
Kind Code:
B2
Abstract:
PURPOSE: To provide a communication system capable of starting an internal circuit by allowing a mobile communication equipment to detect accurately to enter a communication available zone with a stationary communication equipment.
CONSTITUTION: In the communication system making communication between a stationary station and a responder mounted on an automobile, the stationary station sends a start pilot signal for a prescribed period. Then the responder uses a detection section 22 to detect a reception signal from an antenna 10 and amplifies the signal by an amplifier section 24 and when a signal level after amplification reaches a reference voltage VTH1, a level discrimination section 26 outputs a pulse signal. Then a discrimination pulse generating section 28 converts the pulse signal into a signal whose width is constant and allows an integration section 30 to integrate the signal and when the integration value reaches a reference voltage VTH2, a start discrimination section 32 provides an output of a drive signal for starting the internal circuit. As a result, erroneous start of the internal circuit is prevented on the occurrence of intrusion of noise and then the internal circuit is started accurately only as required.
Inventors:
Mitsuhiro Sano
Application Number:
JP16819694A
Publication Date:
December 10, 2001
Filing Date:
July 20, 1994
Export Citation:
Assignee:
株式会社デンソー
International Classes:
G01S13/74; G06K7/00; G07B15/00; G08G1/017; H04B7/26; H04W52/00; H04W52/02; H04W88/02; (IPC1-7): H04B7/26; G01S13/74; G07B15/00
Domestic Patent References:
| JP5281347A | ||||
| JP696290A | ||||
| JP2257726A | ||||
| JP53142890A | ||||
| JP4133525A |
Attorney, Agent or Firm:
Tsutomu Adachi