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Multiple-band mobile transceiver having a smaller number of local oscillators

  • US 5,966,666 A
  • Filed: 02/06/1997
  • Issued: 10/12/1999
  • Est. Priority Date: 03/22/1996
  • Status: Expired due to Term
First Claim
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1. A mobile transceiver which operates in a plurality of radio frequency bands for each of transmission and reception by switching among different radio frequency bands used by a plurality of mobile communications systems, the mobile transceiver comprising:

  • a single voltage-controlled oscillator for producing an oscillation signal having a selected one of frequencies that correspond to the plurality of mobile communications systems; and

    a frequency division and distribution section which receives an output oscillation signal of the voltage-controlled oscillator, said frequency division and distribution section splitting the oscillation signal of the voltage-controlled oscillator into a transmission-side local oscillation signal and a reception-side local oscillation signal while frequency dividing the oscillation signal of the voltage-controlled oscillator, the frequency division and distribution section comprising;

    at least one frequency divider for providing division numbers for accommodating all combinations of the plurality of mobile communications systems and the transmission-side local oscillation signal and the reception side local oscillation signal; and

    at least one switch that is switched in accordance with a selected one of the plurality of mobile communications systems.

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