This paper introduces a current-mode universal biquad circuit using only plus type CCs(current conveyors)(i.e.DVCCs(differential voltage current conveyors)and CCIIs(second generation current conveyors)).The circuit en...This paper introduces a current-mode universal biquad circuit using only plus type CCs(current conveyors)(i.e.DVCCs(differential voltage current conveyors)and CCIIs(second generation current conveyors)).The circuit enables LP(low-pass),BP(band-pass),HP(high-pass),BS(band-stop)and AP(all-pass)responses by the selection and/or addition of the input and output currents without any component matching constraints.Moreover the circuit parametersω0 and Q can be set orthogonally adjusting the circuit components.A design example is given together with simulation responses by PSPICE.展开更多
According to the structures and characteristics of the current conveyor circuits, a non inverting current integrator, an inverting current integrator and a multi output follower circuits have been constructed. A...According to the structures and characteristics of the current conveyor circuits, a non inverting current integrator, an inverting current integrator and a multi output follower circuits have been constructed. Applying inter reciprocity network theorem, a method was developed to implement the transform from RLC filter prototype circuits into active RC filter circuits, and finally into current mode filter based on current conveyor. The transfer functions and component sensitivities are common among them. It is effective in the processing of current mode analog signal, which is easy to implement.展开更多
A complete state variable current-mode biquadratic filter built by duo-output CCII (DOCCII) with variable current gain is presented. All the coefficients of the filter can be independently tuned through the variable c...A complete state variable current-mode biquadratic filter built by duo-output CCII (DOCCII) with variable current gain is presented. All the coefficients of the filter can be independently tuned through the variable current gain factors of the DOCCII. Based on the principles upon which the general biquadratic filter was constructed, a universal electronically tunable current-mode filter is proposed which implements the low-pass, high-pass, band-pass, band-suppress and all-pass second order transfer functions simultaneously. The PSPICE simulations of frequency responses of second-order filter of are also given.展开更多
1. IntroductionA large number of networks for realizing first and second order transfer functions using a currentconveyor have been reported in the literature. Especially, the networks that can offer highinput impedan...1. IntroductionA large number of networks for realizing first and second order transfer functions using a currentconveyor have been reported in the literature. Especially, the networks that can offer highinput impedance attract attention, for high input impedance has the advantage that the networksmay be used in cascade without requiring impedance matching device. In the Higashimura and展开更多
This paper introduces a mixed-mode biquadratic circuit employing DVCCs (differential voltage current conveyors) and grounded passive components. The biquadratic circuit can perform mixed-mode operation selecting the...This paper introduces a mixed-mode biquadratic circuit employing DVCCs (differential voltage current conveyors) and grounded passive components. The biquadratic circuit can perform mixed-mode operation selecting the input and output terminals. And the circuit enables LP (low-pass), BP (band-pass), HP (high-pass), BS (band-stop) and AP (all-pass) transfer functions by suitably choosing the input terminals. The circuit parameters o30 and Q can be tuned orthogonally through adjusting the passive components. The biquadratic circuit enjoys very low sensitivities with respect to the circuit components. The achievement example is given together with simulation results by PSPICE.展开更多
This paper introduces IAFs (inverse active filters) employing CCIIs (second generation current conveyors) and groundedpassive components. The IAFs enable ILP (inverse low-pass), IBP (inverse band-pass) and IHP...This paper introduces IAFs (inverse active filters) employing CCIIs (second generation current conveyors) and groundedpassive components. The IAFs enable ILP (inverse low-pass), IBP (inverse band-pass) and IHP (inverse high-pass) characteristics byadding the circuit currents. Additionally, the circuit parameters ω0 and Q can be set orthogonally adjusting the circuit components.The achievement example is given together with simulation results by PSPICE.展开更多
A novel configuration of CCII based continuous time current mode biquad filter is proposed in this paper. The filter only consists of minimum CCII elements and grounded resistors and capacitors. The topology is rea...A novel configuration of CCII based continuous time current mode biquad filter is proposed in this paper. The filter only consists of minimum CCII elements and grounded resistors and capacitors. The topology is really simple, and the sensitivity is really low, so it suits full integration. The non idealities of the CCIIs are discussed and the compensations are given. The computer simulation of the transistor level is carried out and the results show that the proposed circuits are effective.展开更多
This paper presents a current controlled fully balanced second-generation current conveyor circuit(CF-BCCII).The proposed circuit has the traits of fully balanced architecture, and its X-Y terminals are current cont...This paper presents a current controlled fully balanced second-generation current conveyor circuit(CF-BCCII).The proposed circuit has the traits of fully balanced architecture, and its X-Y terminals are current control-lable.Based on the CFBCCII, two biquadratic universal filters are also proposed as its applications.The CFBCCII circuits and the two filters were fabricated with chartered 0.35-μm CMOS technology;with ±1.65 V power supply voltage, the total power consumption of the CFBCCII circuit is 3.6 mW.Comparisons between measured and HSpice simulation results are also given.展开更多
文摘This paper introduces a current-mode universal biquad circuit using only plus type CCs(current conveyors)(i.e.DVCCs(differential voltage current conveyors)and CCIIs(second generation current conveyors)).The circuit enables LP(low-pass),BP(band-pass),HP(high-pass),BS(band-stop)and AP(all-pass)responses by the selection and/or addition of the input and output currents without any component matching constraints.Moreover the circuit parametersω0 and Q can be set orthogonally adjusting the circuit components.A design example is given together with simulation responses by PSPICE.
文摘According to the structures and characteristics of the current conveyor circuits, a non inverting current integrator, an inverting current integrator and a multi output follower circuits have been constructed. Applying inter reciprocity network theorem, a method was developed to implement the transform from RLC filter prototype circuits into active RC filter circuits, and finally into current mode filter based on current conveyor. The transfer functions and component sensitivities are common among them. It is effective in the processing of current mode analog signal, which is easy to implement.
文摘A complete state variable current-mode biquadratic filter built by duo-output CCII (DOCCII) with variable current gain is presented. All the coefficients of the filter can be independently tuned through the variable current gain factors of the DOCCII. Based on the principles upon which the general biquadratic filter was constructed, a universal electronically tunable current-mode filter is proposed which implements the low-pass, high-pass, band-pass, band-suppress and all-pass second order transfer functions simultaneously. The PSPICE simulations of frequency responses of second-order filter of are also given.
文摘1. IntroductionA large number of networks for realizing first and second order transfer functions using a currentconveyor have been reported in the literature. Especially, the networks that can offer highinput impedance attract attention, for high input impedance has the advantage that the networksmay be used in cascade without requiring impedance matching device. In the Higashimura and
文摘This paper introduces a mixed-mode biquadratic circuit employing DVCCs (differential voltage current conveyors) and grounded passive components. The biquadratic circuit can perform mixed-mode operation selecting the input and output terminals. And the circuit enables LP (low-pass), BP (band-pass), HP (high-pass), BS (band-stop) and AP (all-pass) transfer functions by suitably choosing the input terminals. The circuit parameters o30 and Q can be tuned orthogonally through adjusting the passive components. The biquadratic circuit enjoys very low sensitivities with respect to the circuit components. The achievement example is given together with simulation results by PSPICE.
文摘This paper introduces IAFs (inverse active filters) employing CCIIs (second generation current conveyors) and groundedpassive components. The IAFs enable ILP (inverse low-pass), IBP (inverse band-pass) and IHP (inverse high-pass) characteristics byadding the circuit currents. Additionally, the circuit parameters ω0 and Q can be set orthogonally adjusting the circuit components.The achievement example is given together with simulation results by PSPICE.
文摘A novel configuration of CCII based continuous time current mode biquad filter is proposed in this paper. The filter only consists of minimum CCII elements and grounded resistors and capacitors. The topology is really simple, and the sensitivity is really low, so it suits full integration. The non idealities of the CCIIs are discussed and the compensations are given. The computer simulation of the transistor level is carried out and the results show that the proposed circuits are effective.
基金supported by the National Natural Science Foundation of China(No.60676021)
文摘This paper presents a current controlled fully balanced second-generation current conveyor circuit(CF-BCCII).The proposed circuit has the traits of fully balanced architecture, and its X-Y terminals are current control-lable.Based on the CFBCCII, two biquadratic universal filters are also proposed as its applications.The CFBCCII circuits and the two filters were fabricated with chartered 0.35-μm CMOS technology;with ±1.65 V power supply voltage, the total power consumption of the CFBCCII circuit is 3.6 mW.Comparisons between measured and HSpice simulation results are also given.