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Radio control transmitter which suppresses harmonic radiation

  • US 4,806,930 A
  • Filed: 05/02/1988
  • Issued: 02/21/1989
  • Est. Priority Date: 08/01/1986
  • Status: Expired due to Term
First Claim
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1. A coded radio frequency transmitter for remote control comprising, a transmit switch, an encoder connected to said transmit switch, code selector switches connected to said encoder, a radio frequency oscillator which oscillates at the desired radiation frequency connected to the output of said encoder and including a transistor amplifier and a first inductor connected in the emitter, collector or base circuit of said transistor so as to produce a high impedance to harmonics of said desired radiation frequency, wherein said first inductor is in the emitter circuit of said transistor amplifier, and including a second inductor which causes a high impedance to harmonics of said desired radiation frequency connected in the base circuit of said transistor.

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