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Frequency doubler circuit with trimmable current control

  • US 7,180,342 B1
  • Filed: 10/11/2001
  • Issued: 02/20/2007
  • Est. Priority Date: 10/26/2000
  • Status: Active Grant
First Claim
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1. A circuit comprising:

  • a current source for generating a reference current; and

    a frequency doubler circuit coupled to said current source and receiving a first frequency signal and also receiving said reference current, said frequency doubler circuit generating a second frequency signal and using said reference current to compensate for process variation of capacitance and using said reference current to maintain a known duty cycle.

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