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High-speed duty cycle control circuit

  • US 6,819,155 B1
  • Filed: 06/23/2003
  • Issued: 11/16/2004
  • Est. Priority Date: 06/23/2003
  • Status: Expired due to Fees
First Claim
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1. A duty cycle correction circuit for changing the duty cycle for a differential periodic signal, the duty cycle correction circuit including:

  • input circuitry for receiving a first differential signal, the differential signal including a first signal component and a complement signal component, each of the signal components having initial high and low signal levels and respective first and second DC bias levels, the input circuitry including a differential output having a first path for propagating the first signal component and a second path for propagating the complement signal component;

    programmable load circuitry coupled to the differential output and having a programmable input, the load circuitry operative to programmably vary the DC bias level of at least one of the signal components; and

    a differential gain amplifier coupled to the first differential output and disposed downstream of the load circuitry.

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