Abstract
The design of a new high-Q LC pseudo switched-capacitor bandpass filter is presented. The proposed filter is tuned by using a command circuit made up by a ring voltage controlled oscillator (VCO) with 'XOR' gates. Fabricated in a standard 0.35 /spl mu/m CMOS, this circuit is intended to replace the SAW filters in wireless broadband applications. Measured results demonstrate interesting performances; a tunable center frequency range of 285 MHz [240-525 MHz] and a quality factor that can be as high as 300 within the tunable frequency range.
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