Title :
A 5.8-mW, 20-MHz, 4th-order programmable elliptic filter achieving over −80-dB IM3
Author :
Wan, Peiyuan ; Chiu, Yun ; Lin, Pingfen
Author_Institution :
Univ. of Illinois at Urbana-Champaign, Urbana, IL, USA
Abstract :
Frequency compensation of active-RC elliptic filter is enabled for the first time by employing a derivative-free architecture. In conjunction with a built-in automatic unity-gain band-width (ωu) tracking scheme, the prototype 4th-order active-RC elliptic low-pass filter (LPF) measures a digitally programmable bandwidth of 14-23 MHz, a two-tone IM3 at 6 MHz consistently better than -80 dB with a full-scale input of over 800 mVpp, a 1-dB in-band ripple and 45-dB stop-band rejection, all across wide temperature and voltage ranges. The LPF dissipates 5.8 mW from a 1.2-V supply and occupies 0.1 mm2 in 0.13-μm CMOS.
Keywords :
active filters; elliptic filters; low-pass filters; programmable filters; 4th-order programmable elliptic filter; CMOS; LPF; bandwidth 14 MHz to 23 MHz; derivative-free architecture; frequency 20 MHz; frequency 6 MHz; frequency compensation; low-pass filter; power 5.8 mW; prototype 4th-order active-RC elliptic filter; size 0.13 micron; unity-gain band-width tracking scheme; voltage 1.2 V; Bandwidth; CMOS integrated circuits; Frequency measurement; Frequency response; Low pass filters; Prototypes; Temperature measurement;
Conference_Titel :
Custom Integrated Circuits Conference (CICC), 2010 IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4244-5758-8
DOI :
10.1109/CICC.2010.5617613
