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Communication terminal with low carrier feedthrough and communication system using such a terminal

  • US 20050020217A1
  • Filed: 07/23/2003
  • Published: 01/27/2005
  • Est. Priority Date: 07/23/2003
  • Status: Abandoned Application
First Claim
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1. A terminal for use in a communication system comprising:

  • a coder having an input terminal for receiving an input signal, and an output terminal for providing a coded signal;

    an upconverter core having a first input terminal for receiving a first signal having predetermined spectral content at an input frequency and an output terminal for providing an output signal having substantially said predetermined spectral content at a higher frequency using a local oscillator signal having a carrier frequency;

    an electrical measurement circuit having an input terminal coupled to said output terminal of said upconverter core, and a first output terminal for providing a first offset correction signal representative of a power of said output signal at said carrier frequency; and

    a first summing device having a positive input terminal for receiving said coded signal, a negative input terminal coupled to said first output terminal of said electrical measurement circuit, and an output terminal coupled to said first input terminal of said upconverter core for providing said first signal.

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