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Control circuit for control of peripheral equipment of wireless communication appliance

  • US 5,495,519 A
  • Filed: 03/14/1995
  • Issued: 02/27/1996
  • Est. Priority Date: 10/04/1993
  • Status: Expired due to Term
First Claim
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1. A control circuit for use in switching of peripheral equipment in association with a wireless communication appliance, the control circuit being able to distinguish the appliance being in use or in a stand-by mode, said circuit being characterized in that an antenna means is used to pick up electromagnetic waves sent off from said wireless communication appliance, said antenna having a greatest dimension substantially shorter than a quarter wavelength of said waves;

  • said antenna being connected to one end of an un-tuned wave detecting means which is grounded at the other end, said detecting means detecting said electromagnetic waves;

    a control voltage being generated in said control circuit in correspondence to presence of said detected electromagnetic waves and said voltage being amplified by a voltage amplifier wherein said peripheral equipment is controlled by switching said peripheral equipment according to said voltage.

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