Current-mode filter in 65nm CMOS for a software-radio application

Author

Kolm, Robert ; Yan, Weixun ; Zimmermann, Horst

Author_Institution

Inst. for Electr. Meas. & Circuit Design, Vienna Univ. of Technol., Vienna

fYear

2008

fDate

18-21 May 2008

Firstpage

3130

Lastpage

3133

Abstract

For the transmit path of a software radio defined system a 3rd-order current-mode filter in 65 nm CMOS is presented. This filter consists of a 1st-order current-mode filter where a capacitance multiplication technique is applied. With this technique the needed capacitance is decreased by a factor of 2. The 2nd-order filter consists of an active gm-RC filter where the output voltage is also converted into a current. The filter has a switchable cut-off frequency of 1 MHz and 4 MHz, the current consumption is 5.26 mA at V_DD=1.2 V and for an input current of 340 muA the THD is 1%.

Keywords

CMOS integrated circuits; active filters; capacitance; current-mode circuits; software radio; 3rd-order current-mode filter; CMOS; active gm-RC filter; capacitance multiplication technique; current 5.26 mA; frequency 1 MHz; frequency 4 MHz; lst-order current-mode filter; size 65 nm; software-radio application; switchable cut-off frequency; Analog circuits; Application software; CMOS technology; Capacitance; Capacitors; Cutoff frequency; Filters; Mirrors; Signal processing; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2008. ISCAS 2008. IEEE International Symposium on

Conference_Location

Seattle, WA

Print_ISBN

978-1-4244-1683-7

Electronic_ISBN

978-1-4244-1684-4

Type

conf

DOI

10.1109/ISCAS.2008.4542121

Filename

4542121