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Start signal outputting circuit

  • US 7,215,162 B2
  • Filed: 09/24/2003
  • Issued: 05/08/2007
  • Est. Priority Date: 09/25/2002
  • Status: Active Grant
First Claim
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1. A start signal outputting circuit having an RF/DC convertor circuit for converting a high frequency power (RF) signal into a direct current (DC) potential and outputting it, said RF/DC convertor circuit comprising:

  • a device working as a diode for rectifying the high frequency power (RF) signal inputted on its anode;

    a first transistor connected to an anode side of said diode, said first transistor working as a constant current source for supplying a constant current to the anode side of said diode by a positive potential being applied thereto; and

    a second transistor inserted between a cathode side of said diode and ground, said second transistor working as a constant current source for removing a constant current from a current outputted from the cathode side of said diode by a positive potential being applied thereto.

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