A 33 MHz 70 dB-SNR Super-Source-Follower-Based Low-Pass Analog Filter

Author

De Matteis, Marcello ; Pezzotta, Alessandro ; D´Amico, Stefano ; Baschirotto, Andrea

Author_Institution

Dept. of Phys. “G. Occhialini”, Univ. of Milano-Bicocca, Milan, Italy

Volume

50

Issue

7

fYear

2015

fDate

Jul-15

Firstpage

1516

Lastpage

1524

Abstract

In this paper, a 4th-order low-pass continuous-time analog filter is presented, that is implemented with the cascade of two efficient and compact biquadratic cells, realized using the Super-Source-Follower topology. The biquadratic cell uses only two capacitors and four transistors: two transistors for the signal processing and two transistors as current sources for biasing purpose. The 4th-order filter prototype has been integrated in 0.18 μm CMOS technology. For a 33 MHz cut-off frequency, the filter performs 18 dBm-IIP3 for two tones at 2 MHz and 3 MHz, with total current of 770 μA from a single 1.8 V supply voltage.

Keywords

CMOS analogue integrated circuits; low-pass filters; 4th-order low-pass continuous-time analog filter; CMOS technology; biquadratic cells; current 770 muA; frequency 33 MHz; size 0.18 mum; super-source-follower-based low-pass analog filter; voltage 1.8 V; Capacitors; Impedance; Linearity; Noise; Topology; Transfer functions; Transistors; Analog filters; CMOS 0.18 $mu$m; biquadratic cell; continuous-time filters; low power; super source follower;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2015.2411626

Filename

7080931