Current-Mode First-Order Universal Filter and its Voltage-Mode Transformation

This paper deals with the realization of current-mode first-order universal filter based on multiple output second generation current conveyor (MO-CCII). Two MO-CCIIs, one resistor and one capacitor are used in the circuit realization. The proposed work includes additional features such as ease of cascadability, easily implementable in modern integrated circuit technology and no requirement of passive components matching condition. The additional beauty of the proposed filter structure is that all three responses can also be realized by interchanging the positions of passive components as well. Moreover, a possible transformation of the proposed current-mode type universal filter into a voltage-mode type universal filter using network transpose method is also explored. The possibility of mode transformation further expands the scope of proposed idea. The theoretical aspects are verified using cadence VIRTUOSO simulation results.

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The voltage-mode first order universal filter using single voltage differencing differential input buffered amplifier with electronic controllability

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v12i2.pp1308-1323 ◽

2022 ◽

Vol 12 (2) ◽

pp. 1308

Author(s):

Danupat Duangmalai ◽

Peerawut Suwanjan

Keyword(s):

Integrated Circuit ◽

Universal Filter ◽

Differential Input ◽

First Order ◽

Voltage Mode ◽

Transconductance Amplifier ◽

Low Pass ◽

Simulation And Experiment ◽

Electronically Tunable ◽

High Pass

In this research contribution, the electronically tunable first-order universal filter employing a single voltage differencing differential input buffered amplifier (VD-DIBA) (constructed from two commercially available integrated circuit (IC): the operational transconductance amplifier, IC number LT1228, and the differential voltage input buffer, IC number AD830), one capacitor and two resistors. The features of the designed first order universal filter are as follows. Three voltage-mode first-order functions, low-pass (LP), all-pass (AP) and high-pass (HP) responses are given. The natural frequency (𝜔0) of the presented configuration can be electronically adjusted by setting the DC bias current. Moreover, the voltage gain of the LP and HP filters can be controllable. The phase responses of an AP configuration can be varied from 00 to −1800 and 1800 to 00. The power supply voltages were set at ±5 𝑉. Verification of the theoretically described performances of the introduced electronically tunable universal filter was proved by the PSpice simulation and experiment.

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First-Order Current-Mode Fully Cascadable All-Pass Frequency Selective Structure, Its Higher-Order Extension and Tunable Transformation Possibilities

Journal of Circuits System and Computers ◽

10.1142/s021812662250030x ◽

2021 ◽

pp. 2250030

Author(s):

Bhartendu Chaturvedi ◽

Jitendra Mohan ◽

Jitender

Keyword(s):

Current Mode ◽

Matching Condition ◽

Quality Performance ◽

Passive Components ◽

First Order ◽

Component Matching ◽

Frequency Selective ◽

High Output Impedance ◽

Theoretical Analyses ◽

High Output

An extra-X second-generation current conveyor (EXCCII) based first-order current-mode all-pass frequency selective structure is presented through this paper. A grounded resistor and a grounded capacitor are used as passive components. Single active element based realization directly correlates with the circuit’s simplicity. The grounded nature of passive components is advantageous from IC fabrication aspects. The proposed circuit offers cascadability support through low input impedance and high output impedance. The ability of the presented idea to deliver the desired output without meeting any stringent component matching condition further simplifies the circuit’s operation. Sensitivity performance of the proposed circuit is good. The quality performance at high frequency is another value addition to the circuit’s signal processing attributes. Analyses showing the circuit’s behavior under non-ideal conditions are also described in detail. Validation of theoretical analyses is supported by simulations carried out on PSPICE at 0.25[Formula: see text][Formula: see text]m technology.

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A DVCC-Based Current-Mode First-Order Universal Filter

Journal of Circuits System and Computers ◽

10.1142/s0218126621503059 ◽

2021 ◽

pp. 2150305

Author(s):

Firat Yucel

Keyword(s):

Integrated Circuit ◽

Current Mode ◽

Current Conveyors ◽

Circuit Realization ◽

Passive Element ◽

Pass Filter ◽

Typical Application ◽

First Order ◽

Low Pass ◽

High Output Impedance

A current-mode first-order filter configuration simultaneously providing noninverting and inverting low-pass (LP) and high-pass (HP) responses depending on passive element choice is proposed. In addition, all-pass filter (APF) responses can be easily obtained with interconnection of LP and HP output currents. The proposed filter employs only two differential voltage current conveyors, a grounded resistor and a grounded capacitor, so it is suitable for integrated circuit realization. It provides the feature of high output impedance. It does not need any passive element matching constraints. A voltage-mode oscillator based on the inverting APF is presented as a typical application. The performance of the proposed configuration is verified through many SPICE simulation and experimental test results.

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Low Voltage Operated Current-Mode First-Order Universal Filter and Sinusoidal Oscillator Suitable for Signal Processing Applications

AEU - International Journal of Electronics and Communications ◽

10.1016/j.aeue.2018.11.025 ◽

2019 ◽

Vol 99 ◽

pp. 110-118 ◽

Cited By ~ 10

Author(s):

Bhartendu Chaturvedi ◽

Atul Kumar ◽

Jitendra Mohan

Keyword(s):

Signal Processing ◽

Low Voltage ◽

Current Mode ◽

Universal Filter ◽

First Order ◽

Sinusoidal Oscillator

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A Current Mode Universal Filter and a Single Resistance Controlled Oscillator Employing only Grounded Passive Elements: Applications of VDCC

Electronics ETF ◽

10.53314/els2125065a ◽

2021 ◽

Vol 25 (2) ◽

pp. 65-76

Author(s):

Tajinder Singh Arora ◽

Keyword(s):

Integrated Circuit ◽

Current Mode ◽

Paper Analysis ◽

Current Conveyor ◽

Universal Filter ◽

Dual Mode ◽

Passive Element ◽

Research Article ◽

Sinusoidal Oscillator ◽

A Current

This research article explores the possible applications of voltage differencing current conveyor (VDCC), as a current mode universal filter and a sinusoidal oscillator. Without the need for an additional active/passive element, a very simple hardware modification makes it a dual-mode quadrature oscillator from the filter configuration. Both the proposed circuit requires only two VDCC and all grounded passive elements, hence a preferable choice for integration. The filter has some desirable features such as availability of all five explicit outputs, independent tunability of filter parameters. Availability of explicit quadrature current outputs, independence in start and frequency of oscillations, makes it a better oscillator design. Apart from prevalent CMOS simulation results, VDCC is also realized and experimentally tested using the off-the-shelf integrated circuit. All the pen and paper analysis such as non-ideal, sensitivity and parasitic analysis supports the design.

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