Direct synthesis approach for voltage mode transfer functions using current conveyors

2002 ◽  
Author(s):  
A. Toker ◽  
M. Discigil ◽  
O. Cicekoglu ◽  
H.H. Kuntman
Keyword(s):  
Transfer Functions ◽  
Direct Synthesis ◽  
Current Conveyors ◽  
Voltage Mode ◽  
Synthesis Approach

VOLTAGE-MODE DDCC-BASED MULTIFUNCTION FILTERS

2007 ◽  
Vol 16 (01) ◽  
pp. 93-104 ◽  
Author(s):  
HUA-PIN CHEN ◽  
KUO-HSIUNG WU
Keyword(s):  
Transfer Functions ◽  
Slight Modification ◽  
Pass Band ◽  
Current Conveyors ◽  
Pass Filter ◽  
Voltage Mode ◽  
Low Pass ◽  
Biquadratic Filter ◽  
Multifunction Filter ◽  
Passive Sensitivity

Two new voltage-mode multifunction biquadratic filter configurations were proposed. The first proposed high-input impedance multifunction filter with single input and four outputs, which can simultaneously realize voltage-mode low-pass, band-pass, and high-pass filter responses employing all grounded passive components. The second proposed configuration is a slight modification of the first proposed circuit. It leads two more notch and all-pass transfer functions than the first proposed circuit. Moreover, both the proposed circuits still offer the following advantages: (i) orthogonal control of ωo and Q, (ii) low active and passive sensitivity performances, (iii) simpler configuration due to the use of noninverting type differential difference current conveyors (DDCCs) only.

scholarly journals Comparative Study of Discrete Component Realizations of Fractional-Order Capacitor and Inductor Active Emulators

2018 ◽  
Vol 27 (11) ◽  
pp. 1850170 ◽  
Author(s):  
Georgia Tsirimokou ◽  
Aslihan Kartci ◽  
Jaroslav Koton ◽  
Norbert Herencsar ◽  
Costas Psychalinos
Keyword(s):  
Comparative Study ◽  
Fractional Order ◽  
High Performance ◽  
Continued Fraction ◽  
Transfer Functions ◽  
Operational Amplifiers ◽  
Current Conveyors ◽  
Continued Fraction Expansion ◽  
Current Feedback ◽  
Discrete Component

Due to the absence of commercially available fractional-order capacitors and inductors, their implementation can be performed using fractional-order differentiators and integrators, respectively, combined with a voltage-to-current conversion stage. The transfer function of fractional-order differentiators and integrators can be approximated through the utilization of appropriate integer-order transfer functions. In order to achieve that, the Continued Fraction Expansion as well as the Oustaloup’s approximations can be utilized. The accuracy, in terms of magnitude and phase response, of transfer functions of differentiators/integrators derived through the employment of the aforementioned approximations, is very important factor for achieving high performance approximation of the fractional-order elements. A comparative study of the accuracy offered by the Continued Fraction Expansion and the Oustaloup’s approximation is performed in this paper. As a next step, the corresponding implementations of the emulators of the fractional-order elements, derived using fundamental active cells such as operational amplifiers, operational transconductance amplifiers, current conveyors, and current feedback operational amplifiers realized in commercially available discrete-component IC form, are compared in terms of the most important performance characteristics. The most suitable of them are further compared using the OrCAD PSpice software.

Polynuclear Heterometallic Complexes from Metal Powders: The “Direct Synthesis” Approach

2014 ◽  
Vol 2014 (27) ◽  
pp. 4496-4517 ◽  
Author(s):  
Dmytro S. Nesterov ◽  
Oksana V. Nesterova ◽  
Vladimir N. Kokozay ◽  
Armando J. L. Pombeiro
Keyword(s):  
Direct Synthesis ◽  
Heterometallic Complexes ◽  
Metal Powders ◽  
Synthesis Approach

NOVEL VOLTAGE-MODE MULTIFUNCTION FILTER USING ONLY TWO DDCCs

2008 ◽  
Vol 17 (06) ◽  
pp. 1161-1172 ◽  
Author(s):  
HUA-PIN CHEN ◽  
KUO-HSIUNG WU
Keyword(s):  
Cmos Technology ◽  
The Other ◽  
Current Conveyors ◽  
Lowpass Filter ◽  
Analog Filter ◽  
Chip Area ◽  
Voltage Mode ◽  
Single Output ◽  
Multifunction Filter ◽  
Component Matching

A new voltage-mode biquad with four inputs and four outputs using only two differential difference current conveyors (DDCCs), two grounded capacitors, and two resistors is proposed. The proposed circuit can act as a multifunction voltage-mode filter with one or three inputs and four outputs and can perform simultaneous realization of voltage-mode notch, highpass, bandpass, and lowpass filter signals from the four output terminals, respectively, without any component choice conditions. On the other hand, it also can act as a universal voltage-mode filter with four inputs and a single output and can realize five generic voltage-mode filter signals from the same configuration without any component-matching conditions. Finally, to verify our architecture, we have designed this analog filter chip with TSMC 0.35 μm 2P4M CMOS technology. This chip operates to 1.125 MHz and consumes 30.95 mW. The chip area of the analog filter is about 0.822 mm2.

scholarly journals Minimum MOS Transistor Count Fractional-Order Voltage-Mode and Current-Mode Filters

Technologies ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 85
Author(s):  
Panagiotis Bertsias ◽  
Costas Psychalinos ◽  
Ahmed S. Elwakil ◽  
Brent Maundy
Keyword(s):  
Fractional Order ◽  
Transfer Functions ◽  
Circuit Complexity ◽  
Current Mode ◽  
Cmos Process ◽  
Mos Transistors ◽  
Correct Operation ◽  
Mos Transistor ◽  
Voltage Mode ◽  
Filter Structures

Voltage-mode and current-mode fractional-order filter topologies, which are capable of realizing various types of transfer functions, are introduced in this paper. Thanks to the employment of the transconductance parameter of the MOS transistors, the derived filter structures offer the benefit of the electronic adjustment of their frequency characteristics. With regards to the literature, the number of MOS transisitors is minimized leading to significant reduction of the circuit complexity and power dissipation. Simulation results, derived using the Design Kit of the 0.35 μm Austria Mikro Systeme CMOS process and the Cadence IC design suite, confirm the correct operation of the presented filter structures.

scholarly journals Novel Grounded Capacitor All-Pass and Notch Filters Using Current Conveyors and Differential Amplifier

2003 ◽  
Vol 26 (3) ◽  
pp. 167-170 ◽  
Author(s):  
R. Saraswat ◽  
K. Pal ◽  
S. Rana
Keyword(s):  
Input Impedance ◽  
Transfer Functions ◽  
Notch Filter ◽  
Second Order ◽  
Differential Amplifier ◽  
Current Conveyors ◽  
Output Impedance ◽  
High Input ◽  
Notch Filters ◽  
High Input Impedance

Three circuits each realizing second-order all-pass/notch filter transfer functions are reported. All circuits use grounded capacitors and are suitable for IC implementation. These circuits offer the advantages of high input impedance and low output impedance and are superior to all earlier realisations.

Voltage Differencing Gain Amplifier-Based nth-Order Low-Pass Voltage-Mode Filter

2018 ◽  
Vol 27 (06) ◽  
pp. 1850089 ◽  
Author(s):  
Zehra Gulru Cam Taskiran ◽  
Herman Sedef ◽  
Fuat Anday
Keyword(s):  
General Formula ◽  
Building Block ◽  
Transfer Functions ◽  
Building Blocks ◽  
Voltage Mode ◽  
Active Elements ◽  
Filter Structure ◽  
Low Pass ◽  
Minimum Number ◽  
Simple Filter

In this paper, a new active-C filter realizing the general [Formula: see text]th-order low-pass voltage transfer functions using [Formula: see text] voltage differencing gain amplifiers (VDGAs) is presented. In this realization minimum number of equal-valued grounded capacitors and [Formula: see text] active elements are used. Due to the adjustability of the transconductance of the VDGA with current, different gains can be realized using the same building block and a simple filter structure can be created. The filter which is composed of VDGA building blocks is suitable for integration and advantageous in terms of eliminating parasitic effects because all capacitors are grounded and the filter structure has no resistors. All simulations are performed on SPICE and the accuracy of this method is validated experimentally with commercially available products upon on-board circuit.

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