Integrated channel filter using multiple resonant filters...

Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression

Reexamination Certificate

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Details

C327S552000, C327S557000

Reexamination Certificate

active

07852146

ABSTRACT:
A circuit includes a first filter comprising a first inductor coupled to a first variable capacitor, wherein the first filter is associated with a first resonant frequency. The circuit further comprises an amplifier coupled to the first filter and a second filter coupled to the amplifier. The second filter comprises a second inductor coupled to a second variable capacitor, wherein the second filter is associated with a second resonant frequency that is substantially the same as the first resonant frequency. At least a portion of the first filter and at least a portion of the second filter are formed on an integrated circuit.

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State Intellectual Property Office of the People's Republic of China; The First Office Actionfor Application No. 200680012566.X; 7 pages, Nov. 13, 2009.

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