A 5.5MHz CMOS Low-Pass Filter using a `Soft-Switched´ Transconductor

Author

Mensink, Clemens H.J. ; Nauta, Bram ; Wallinga, Hans

Author_Institution

MESA Research Institute, University of Twente, Department of Electrical Engineering, P.O. Box 217, 7500 AE Enschede, The Netherlands. TEL.: x-31-53-4892643, FAX: x-31-53-4892799; e-mail: c.h.j.mensink@el.utwente.nl

fYear

1996

fDate

17-19 Sept. 1996

Firstpage

84

Lastpage

87

Abstract

A new transconductor has been used to implement a third-order 5.5MHz low-pass Bessel filter with extra notch. The filter was realised in 0.5 Â¿m double poly N-well CMOS process. At a 3.3V supply voltage the filter dissipates 12mW and the dynamic range equals 62dB where the THD is-50dB for an input voltage of IVpp. The continuously tuneable transconductor is based on `soft-switching´ of resistors. The converter performance is only determined by the first order characteristics of the transistor. Due to reduced sensitivity for the second order effects of the transistors the converter is well suitable in modern and future sub-micron CMOS processes.

Keywords

CMOS process; Digital signal processing; Dynamic range; Electronic mail; Low pass filters; Resistors; Transconductance; Transconductors; Tuning; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference, 1996. ESSCIRC '96. Proceedings of the 22nd European

Conference_Location

Neuchatel, Switzerland

Print_ISBN

2-86332-197-8

Type

conf

Filename

5468597