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Simplified high frequency tuner and tuning method

  • US 7,639,996 B2
  • Filed: 07/10/2008
  • Issued: 12/29/2009
  • Est. Priority Date: 09/13/1996
  • Status: Expired due to Fees
First Claim
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1. A tuning method comprising, with a tuning device:

  • (a) receiving a channel of interest from a channelized spectrum having a predetermined channel spacing;

    (b) frequency translating the channel of interest to a passband that is near-baseband and the lower edge of which is spaced from DC by at least about the channel spacing, by mixing the channel of interest with approximately phase-quadrature local oscillator signals, thereby creating I and Q signals;

    (c) sensing the operating temperature of the tuning device; and

    (d) using the sensed temperature to correct errors between the I and Q signals.

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