Patent ID: 6362692
Filing Date: 2002-03-26
Classification: H03H,H04B

Abstract:
A monolithic frequency selective component comprising:a substrate; a first port having a voltage-variable frequency-dependent input impedance; a first FET amplifier formed on the substrate, configured as a source follower and having an output coupled to the first port, the first FET amplifier including: a first FET having a first gate width and including a source coupled to the output of the first FET amplifier, a drain coupled to a power supply and a gate coupled to an input to the first FET amplifier; and a second FET having the first gate width and including a source coupled to ground, a gate and a drain coupled to the source of the first FET; a first phase shift network formed on the substrate and coupled to the first port; a second phase shift network formed on the substrate and coupled to the input to the first FET amplifier; and a second FET amplifier formed on the substrate and having an output coupled to the second phase shift network and an input coupled to the output of the first FET amplifier, the second FET amplifier including: a third FET having a second gate width and including a source coupled to ground, a drain and a gate coupled to the input to the second FET amplifier; and a fourth FET having the second gate width and including a drain coupled to the power supply, a gate and a source coupled to the drain of the second FET; and a bias network coupled to the gates of the second and fourth FETs.