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A 4th-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...
A general method for analogue implementation of high-frequency wavelet transform is proposed in which the wavelet transform is synthesized by a bank of Gm-C bandpass filters whose impulse responses are the mother wavelet and its dilations. The proposed approach employs the inverse follow-the-leader-feedback multiple loop feedback structure for filter design to lower the magnitude sensitivity and facilitate...
A high-frequency wavelet filter which employs Gm-C blocks based on leap-frog (LF) multiple-loop feedback (MLF) structure is presented. The proposed method is well suitable for high-quality high-frequency operation since the Gm-C based filter can achieve high frequency, whilst LF MLF configuration has the characteristics of lower magnitude sensitivity and capability of realizing arbitrary rational...
Two CMOS fifth-order gm-C elliptic lowpass filters based on the current-mode multiple loop feedback (MLF) leap-frog (LF) and follow-the-leader-feedback (FLF) configurations are designed. The filters are implemented using a fully-differential linear operational transconductance amplifier (OTA). PSpice simulations using a standard TSMC 0.18mum CMOS process with 1.8V power supply have shown that the...
A 400MHz CMOS seventh-order linear phase gm-C filter based on current-mode (CM) follow-the-leader-feedback (FLF) structure is realized. The filter is implemented using a fully-differential linear operational transconductance amplifier (OTA) based on source degeneration topology. PSpice simulations in a standard TSMC 0.18mum CMOS process and with 2.5V power supply have shown that the cut-off frequency...
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