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Tunable filter with bypass

  • US 6,618,579 B1
  • Filed: 09/24/1999
  • Issued: 09/09/2003
  • Est. Priority Date: 09/24/1999
  • Status: Expired due to Fees
First Claim
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1. An integrated circuit comprising:

  • an amplifier including an inverting terminal, a noninverting terminal and an output terminal;

    at least one first capacitor coupled between the noninverting terminal of the amplifier and ground through at least one first switch; and

    at least one second capacitor coupled between the inverting terminal of the amplifier and the noninverting terminal of the amplifier through at least one second switch, wherein when the second switch is in a first state, the integrated circuit provides filtering, and when the second switch is in a second state, the integrated circuit provides no filtering, wherein when the first switch is in a first state, the integrated circuit provides filtering, and when the first switch is in a second state, the integrated circuit provides no filtering.

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