A new differential input CMOS transconductor circuit for VHF filtering application is introduced. The new circuit has a very high frequency bandwidth, large linear differential mode input range and good common mode si...
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A new differential input CMOS transconductor circuit for VHF filtering application is introduced. The new circuit has a very high frequency bandwidth, large linear differential mode input range and good common mode signal rejection capability. Using 0.35 /spl mu/m CMOS technology with 3 V power supply, the transconductor has a 0.9 V linear differential input range with a -54.6dB total harmonic distortion (THD) and more than 1 GHz - 3dB bandwidth. A 3rd order elliptic low pass g/sub m/-C filter with a cutoff frequency of 150MHz is demonstrated as an application of the new transconductor.
Rail-to-rail differential mode input capability in low voltage CMOS transconductor design is implemented by a pull-down and a pull-up follower in an input buffer. By generating three intermediate voltages in the buffe...
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Rail-to-rail differential mode input capability in low voltage CMOS transconductor design is implemented by a pull-down and a pull-up follower in an input buffer. By generating three intermediate voltages in the buffer stage, three voltages are converted to three currents and subsequently summed using MOSFETs operating in the triode region. The nonlinear current components can be cancelled completely. The lowest supply voltage V/sub dd/ is constrained by 2V/sub th/ of the MOS transistors. A single 1.2V operational transconductor amplifier (OTA) was designed using 0.35/spl mu/m CMOS technology and the simulated I-V linearity error is less than 1% within the rail-to-rail differential input range. The achieved THD is less than 0.6% for a 1 KHz, 1.2 V/sub pp/ input signal.
Recent advances in computer arithmetic offer interesting alternative solutions for low-power design. Depending on an assortment of factors that need to be considered, it is worth evaluating the logarithmic number syst...
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Recent advances in computer arithmetic offer interesting alternative solutions for low-power design. Depending on an assortment of factors that need to be considered, it is worth evaluating the logarithmic number system (LNS) or the residue number system (RNS) for hardware implementations of computationally intensive tasks. As such, the choice of arithmetic can lead to substantial power savings.
This paper addresses the problem of autofocusing in Synthetic Aperture Radar (SAR) imagery by introducing techniques that achieve robust image restoration in the presence of severe heavy-tailed clutter and noise. We e...
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Charge pumping is a widely used method of evaluating the Si-SiO/sub 2/ interfaces in MOSFETs. The modelling of this technique in a p-MOSFET using two-dimensional device simulator is presented. A two-dimensional transi...
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Charge pumping is a widely used method of evaluating the Si-SiO/sub 2/ interfaces in MOSFETs. The modelling of this technique in a p-MOSFET using two-dimensional device simulator is presented. A two-dimensional transient model which accounts for the interface-state dynamics is employed to simulate the charge pumping in MOSFETs with good accuracy. The simulation results are substantiated by measurement results.
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