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High-speed duty cycle test through DC measurement using a combination of relays

  • US 6,943,556 B2
  • Filed: 06/30/2003
  • Issued: 09/13/2005
  • Est. Priority Date: 06/30/2003
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • generating one or more duty cycle control signals by varying one or more voltage values and states of one or more relays receiving the values in order to simulate a potentiometer;

    providing the duty cycle control signals to a device under test;

    separating a first DC portion of a first output signal and a radio frequency (RF) of the first output signal by using a bias-T circuit;

    measuring the first DC portion of the first output signal of the device under test;

    measuring a second DC portion of a second output signal of the device under test; and

    dividing the first DC portion by a sum of the first DC portion and the second DC portion of a second output signal of the device under test.

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