Low voltage low power CMOS inductorless RF bandpass filter with high image rejection capability

Thanachayanont, Apinunt

Low voltage low power CMOS inductorless RF bandpass filter with high image rejection capability

Author(s)

Thanachayanont, Apinunt

Date Issued

December 1, 2002

Type

Conference Paper

Abstract

A new design approach suitable for realising low-power low-voltage high-order RF bandpass filter is proposed. Using a low-voltage VHP CMOS active inductor based on the exploitation of the intrinsic device capacitance, a compact tuneable 2^nd-order RF bandpass filter is realised by adding a series capacitor to the input port of the inductor. The proposed 2^nd-order filter can be readily cascaded to realise a high-order filter with enhanced image rejection ability. High-Q second-, fourth- and sixth-order fully differential filters are realised in a 0.35-μm CMOS process, and HSPICE simulations show that the filters can operate at the 2.4-GHz ISM frequency band under a 2-V power supply voltage with about 1 mW power dissipation per pole.

Citation

Midwest Symposium on Circuits and Systems, 3, III548-III551, 2002