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Interference-free broadband television tuner

  • US 5,847,612 A
  • Filed: 08/01/1997
  • Issued: 12/08/1998
  • Est. Priority Date: 08/01/1997
  • Status: Expired due to Term
First Claim
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1. A method for converting Radio Frequency (RF) signals to Intermediate Frequency (IF) signals using a first local oscillator signal having a first frequency and a second local oscillator signal having a second frequency, wherein a group of said RF signals having a first shape is converted to output signals having a second shape, said method comprising the steps of:

  • identifying one or more pairs of said first and said second frequencies, wherein said pairs of frequencies are useable for converting said group of RF signals to a desired output signal frequency band;

    selecting one of said pairs of frequencies, wherein said selected pair of frequencies is selected to avoid spurious signals that may cause interference in a conversion circuit and to generate output signals having a desired shape; and

    converting said group of RF signals to said output signals using said selected pair of frequencies.

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