A 40MHz 4th-order active-UGB-RC filter using VCO-based amplifiers with zero compensation

Author

Chun-Wei Hsu ; Kinget, Peter R.

Author_Institution

Columbia Univ., New York, NY, USA

fYear

2014

fDate

22-26 Sept. 2014

Firstpage

359

Lastpage

362

Abstract

This paper describes a 4th-order active-UGB-RC filter using VCO-based amplifiers with zero compensation. The VCO-based amplifier intrinsically has a huge DC gain without the associated stability penalties of conventional multi-stage amplifiers such as reducing unity-gain bandwidth or requiring large area by compensation schemes. By using the large gain of the amplifier, the filter achieves small area and good linearity performance for a signal bandwidth of 40MHz. The filter prototype in a 55nm CMOS process has an active area of 0.07mm² and a power consumption of 7.8mW at 1.2V. The measured in-band IIP3 and out-of-band IIP3 are 27.3dBm and 22.5dBm respectively.

Keywords

CMOS analogue integrated circuits; DC amplifiers; RC circuits; active filters; compensation; power consumption; voltage-controlled oscillators; 4th-order active-UGB-RC filter; CMOS process; DC gain; VCO-based amplifiers; active area; analog circuits; associated stability penalty; bandwidth 40 MHz; conventional multistage amplifiers; good linearity performance; in-band IIP3; out-of-band IIP3; power 7.8 mW; power consumption; signal bandwidth; size 55 nm; unity-gain bandwidth reduction; voltage 1.2 V; zero compensation sheme; Bandwidth; CMOS integrated circuits; Frequency measurement; Linearity; Radio frequency; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

European Solid State Circuits Conference (ESSCIRC), ESSCIRC 2014 - 40th

Conference_Location

Venice Lido

ISSN

1930-8833

Print_ISBN

978-1-4799-5694-4

Type

conf

DOI

10.1109/ESSCIRC.2014.6942096

Filename

6942096