首页|Synthesis for Current-Mode Sallen-Key Filter Using VDTAs
Synthesis for Current-Mode Sallen-Key Filter Using VDTAs
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维普
In this work,an original Sallen-Key second-order low-pass filter is first turned into a current-mode one by means of the adjoint network theorem.Two nodal admittance matrices (NAM) of the filter are then educed.Furthermore,these two matrices are expanded through NAM expansion approach,generating one current-mode Sallen-Key filter,which uses two compact voltage differential trans-conductance amplifiers (VDTAs) and two grounded capacitors,implements not only one low-pass transfer function but two band-pass transfer functions,and provides the non-interrelated control between the natural frequency and quality factor.As an example of the synthesized filter,a second-order VDTA filter withf0=1 MHz,Q=1,HLp=-HBP1=HBP2=1 is designed.The used synthesis approach has been confirmed with the help of circuit and computer analysis.
current-mode circuitSallen-Key analog filtercompact voltage differential trans-conductance amplifiers (VDTA)adjoint network theoremnodal admittance matrix expansion
LI Yongan
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School of Physics and Electronic Engineering, Xianyang Normal University, Xianyang 712000, Shaanxi, China
School of Information Engineering, Shaanxi Institute of International Trade & Commerce, Xi'an 712046, Shaanxi, China
NETL
NSTL
万方数据
维普
