Title :
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
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 VDD=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;
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
DOI :
10.1109/ISCAS.2008.4542121
