A 4 th-order Butterworth OTA-C lowpass filter based on voltage mode multiple loop feedback (MLF) inverse follow the leader feedback (IFLF) structure is implemented to support both MB-OFDM UWB and low data rate IR-UWB applications. The filter is implemented using a fully-differential linear operational transconductance amplifier (OTA) in 0.25μm SOI CMOS process. A positive feedback topology is used to form a negative resistance load; in such a way, the DC gain of OTA is enhanced. Moreover, the linearity is improved by means of active biasing. AWR simulations in a 0.25μm SOI CMOS process with 2.5V power supply have shown that the cut-off frequency of the filter ranges from 120MHz to 280MHz and dynamic range is about 54dB. The total power consumption is only 32mW at 250MHz cut-off frequency.
|Title of host publication||2012 IEEE 55th International Midwest Symposium on Circuits and Systems, MWSCAS 2012|
|Number of pages||4|
|Publication status||Published - 16 Oct 2012|
|Event||2012 IEEE 55th International Midwest Symposium on Circuits and Systems, MWSCAS 2012 - Boise, ID, United States|
Duration: 5 Aug 2012 → 8 Aug 2012
|Conference||2012 IEEE 55th International Midwest Symposium on Circuits and Systems, MWSCAS 2012|
|Period||5/08/12 → 8/08/12|