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Signal generating apparatus and method

  • US 5,886,559 A
  • Filed: 08/09/1995
  • Issued: 03/23/1999
  • Est. Priority Date: 04/23/1992
  • Status: Expired due to Fees
First Claim
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1. A signal generating apparatus comprising means for inputting a plurality of variable input signals to produce a cumulative output signal and means for selectively varying the number of said inputs, impedance-changing means in the lines of the respective input signals for providing a substantially constant impedance for the cumulative output signal independent of the number of said inputs.

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