×

High Q gyrator structures

  • US 6,490,706 B2
  • Filed: 11/30/2000
  • Issued: 12/03/2002
  • Est. Priority Date: 12/02/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for making a filter circuit comprising at least one filter stage, the method comprising:

  • a) providing the at least one filter stage with a gyrator core section having four inverters mutually connected in a loop configuration between a pair of input terminals and a pair of output terminals;

    b) providing at least one common mode feedback section, the at least one common mode feedback section being connected between at least one said pair of input terminals and said pair of output terminals and comprising two series connections respectively formed by an inverter and a short-sectioned inverter connected antiparallely between at least one of said input terminals and said output terminals, each of said inverters including at least one of a MOS, CMOS, and BiCMOS transistor, the at least one of a MOS, CMOS, and BiCMOS transistor having a gate, drain, source, and a channel region between said drain and source, and c) wherein the channel region dimensions of the transistors of at least one of the gyrator core section and the common mode feedback section are selected such that the following relationship is fulfilled;

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×