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Sampling network analyzer with stored correction of gain errors

  • US 4,414,638 A
  • Filed: 04/30/1981
  • Issued: 11/08/1983
  • Est. Priority Date: 04/30/1981
  • Status: Expired due to Fees
First Claim
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1. An improved network analyzer of the type having:

  • (a) first input port means, the first input port means for receiving a first analog input signal;

    (b) first input amplifier means, electrically connected to the first input port means and responsive to the first analog input signal, the first input amplifier means for producing a first output signal that is related to the first analog input signal, the first input amplifier means characterized by a first midband voltage gain and a first voltage gain-vs.-frequency response;

    (c) first gain control circuit means, electrically connected to the first input amplifier means, the first gain control circuit means for controlling the first midband voltage gain of the first input amplifier means to approximate one of a first set of predetermined midband voltage gains;

    wherein the improvement comprises;

    (d) first midband voltage gain correcting PROM means, connected to the first gain control circuit means, the first gain correcting PROM means for storing correction factors related to discrepancies between actual midband voltage gain of the first input amplifier means and each of the first set of predetermined midband voltage gains.

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