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In this study, a new voltage-mode multifunction filter based on single current operational amplifier (COA) is presented. The proposed topology employs single CMOS based COA and it provides lowpass, highpass, bandpass and notch filter functions by modifying only three admittances. The COA used in this study is implemented by CMOS based current conveyors and the validity of the proposed circuit is verified...
In this paper, a new current-mode (CM) Kerwin-Huelsman-Newcomb ( KHN) biquad is proposed which is suitable for crossover networks. The proposed circuit employs three differential voltage current conveyors (DVCCs) as active elements together with two capacitors and four resistors as passive elements, which all are grounded. The circuit simultaneously provides the three basic filter functions, namely...
A high input impedance electronically tunable voltage-mode biquadratic filter with single input and three outputs using four simple CMOS operational transconductance amplifiers and two grounded capacitors is proposed. The proposed filter provides low-pass, band-pass and high-pass voltage responses at a high input impedance terminal, which enables easy cascadability of the voltage circuit. Also, the...
This paper presents a new high performance current differencing transconductance amplifier (CDTA), a recently reported active element, especially suitable for analog signal processing applications. The proposed CDTA provide high output impedances at port Z and X, excellent input/output current tracking. The proposed CDTA circuit operats at a supply voltages of plusmn 1.5 V. PSPICE simulation results...
A wide bandwidth CMOS realization of high performance dual output second generation (CCIIplusmn) and third generation (CCIIIplusmn) current conveyors are presented. Both second and third generation current conveyors have the advantages of a wide current and voltage bandwidths, controlled intrinsic resistances at port X, Y and Z. We have developed an optimization program, thanks to Heuristic methodology...
Two new current mode multifunction filter configurations are proposed with a single fully differential current conveyor (FDCCII). The first proposed current mode filter with single input and three outputs, which can simultaneously realize current-mode low-pass (LP), band-pass (BP), high-pass (HP), filter responses. The second proposed current mode filter with two inputs and two outputs, realize current-mode...
A function generator circuit using positive type second-generation current-controlled current conveyors [CCCII+]-based voltage mode non inverting band-pass filter (BPF) as a starting building block is proposed. A direct feedback path from the output to the input of the BPF is provided to obtain a sinusoidal oscillator. Then, [CCCII+(2)] of the sinusoidal oscillator is replaced by multioutput current-controlled...
A voltage-mode DVCC based multifunctional biquardratic filter configuration is proposed. The circuit uses two DVCCs as active elements and together with two capacitors and three resistors as passive elements. The proposed filter can realize the low-pass, high-pass, three band-pass, band-eliminate and all-pass responses in a single circuit. The new configurations offer very high-input impedance, which...
In this paper, a modified auto zeroed integrator is used to design and simulate a low-voltage high-speed and accurate switched capacitor pseudo 2-path filter. The filter is a sixth-order Chebyshev band-pass filter operating at sampling frequency of 1MHz and center frequency of 250 kHz with a quality factor of 50. The circuit is simulated using HSPICE and 0.25??m CMOS technology.
A genetical tuning scheme, implemented in MATLAB with the cooperation of HSPICE, is utilized to tune a capacitorless current-mode bandpass biquad employing a simple plusmn1.5V single-stage CMOS OTA, which is based on the AMSpsilas 0.35 mu CMOS process. The abilities of biquad, indicating the feasibility of such requirements, are examine through the extreme bias conditions. The very complex estimation...
In this paper, the characteristics of the basic current mirror and the continuous-time current-mode current mirror integrator are analyzed. Using the two unlossy loop integrators and the basic current mirrors, the biquad circuit block is implemented. The signal flow graph (SFG) and the improved leap-frog (ILF) structure are simple to implement the six-order band pass filters. Exploring PSPICE9.1 simulation...
In this paper we present new construction of CMOS current conveyor based self cascode current mirrors used in tunable band pass filter. Thus the first step in our design was to improve the CCII performance characteristic. The low voltage self cascode technique in CMOS technology was first studied. A tunable current- mode band pass filter using active elements unity gain current conveyor based self...
A digitally programmable second-order band-pass filter (BPF) with independently programmable characteristics is presented in this paper. The proposed BPF is based on a new ??0.75V second-generation current conveyor (CCII) with digital current gain control. The input stage of the CCII is realized using two complementary MOS differential pairs connected in parallel to ensure rail-to-rail operation....
In this paper, electronically tunable square root domain low pass and band pass filter is designed by using state space synthesis procedure. A dummy DC input is added to state space equations in order to realize the filter. Natural frequency of the proposed filter could be tuned by varying the currents of the current sources. The designed filter is simulated in PSpice using TSMC 0.35 ??m CMOS technology...
This paper presents the design of a current-feedback operational amplifier (CFOA) which is suitable for implementation with standard CMOS integrated-circuit technology of 0.35 mum. The characteristics of the CFOA are derived by using biases of plusmn2.5 V and Ibias=20 muA. The usefulness of the CFOA is demonstrated by designing mixed-mode biquads which realize the low-pass, high-pass, band-pass, notch...
This paper aims at the development of floating gate MOSFET (FGMOS) based low voltage (plusmn 0.75 V), voltage-mode and current-mode circuits. Using low voltage CCII, impedance converter has been realized, which is used to simulate high value of inductance for at least 100 kHz. This circuit has also been used as capacitance multiplier. Some new bandpass filter circuits have also been presented. The...
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