New two-CFOA-based floating immittance simulators

Abuelma’atti, Muhammad Taher; Dhar, Sagar K.; Khalifa, Zainulabideen Jamal

doi:10.1007/s10470-017-0956-9

Cited by 26 publications

(8 citation statements)

References 67 publications

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“…From equation (10), the frequency limitations at low frequencies of the proposed filter (especially for the BP and HP functions) stem from the resistance, R eq . To reduce this effect at low frequencies, the value of the external resistor, R, should be low.…”

Section: Analysis and Study Of The Parasitic Effects On The Proposed ...mentioning

confidence: 99%

“…Electronic circuit design using active building blocks (ABBs) is very popular. As it provides a great deal of convenience and flexibility for designers, the circuits designed using active building blocks are simple in structure and often contain a few passive devices [9][10][11]. Currently, there are a variety of active building blocks with bipolar junction transistor structures or C-MOS transistor structures.…”

Section: Introductionmentioning

confidence: 99%

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Design of Electronically Controllable Multifunction Active Filter with Amplitude Controllability Using Two Commercially Available ICs

Onanong

Supavarasuwat

Angamnuaysiri

et al. 2022

Journal of Electrical and Computer Engineering

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In this contribution, the design and analysis of an active multifunction biquad filter that provides five voltage-mode filtering configurations in the same core filtering circuit are presented. The design emphasizes using the commercially available ICs, LT1228, which are easy for off-the-shelf implementation and cheaper compared with the chip implementation. The proposed multifunction filter is realized from two commercial LT1228 ICs as the active function block, combined with five passive elements (three resistors and two capacitors) with three input voltage nodes and a single output voltage node. The following advantages are given for this design: (i) it provides high-pass (HP), low-pass (LP), band-stop (BS), band-pass (BP), and all-pass (AP) filtering functions; (ii) orthogonal and electronic tuning of the natural frequency ω 0 and bandwidth (the quality factor: Q); (iii) output voltage node of the proposed circuit is low impedance; (iv) passband voltage gain is controllable; and (v) matching condition and extra double gain voltage-mode amplifier are not required. The effect of the parasitic element in LT1228 on the filter performance is analyzed and included to strengthen the design idea. The PSpice simulation results using LT1228 with ±5 V and the experimental results tested from the hardware implementation are given to prove the validity of the designed multifunction filter.

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Section: Analysis and Study Of The Parasitic Effects On The Proposed ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of Electronically Controllable Multifunction Active Filter with Amplitude Controllability Using Two Commercially Available ICs

Onanong

Supavarasuwat

Angamnuaysiri

et al. 2022

Journal of Electrical and Computer Engineering

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“…r out3 = 1 g o3 + g o5 r out4 = 1 g o21 g o20 g m20 + g mb20 + g o18 g o19 g m19 + g mb19 (8) r out5 = 1 g o26 + g o29 r out6 = 1 g o34 g o33 g m33 + g mb33 + g o31 g o32 g m32 + g mb32 (9) r out7 = 1 g o35 + g o37 r out8 = 1 g o43 g o42 g m42 + g mb42 + g o40 g o41 g m41 + g mb41 (10) The current transfer ratios are expressed by…”

Section: Proposed Circuitmentioning

confidence: 99%

“…There are many CFOA-based analogue circuits available in open literature; see, e.g. [1][2][3][4][5][6][7][8][9][10][11][12]. In [1], many analogue circuits using CFOA as active element are described, including inductor and impedance simulators, active filters, oscillators and non-linear circuits.…”

Section: Introductionmentioning

confidence: 99%

“…In [1], many analogue circuits using CFOA as active element are described, including inductor and impedance simulators, active filters, oscillators and non-linear circuits. Most recently, several analogue circuits using CFOAs have been proposed [2][3][4][5][6][7][8][9][10][11][12]. Therefore, CFOA is an attractive device that should be developed.…”

Section: Introductionmentioning

confidence: 99%

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0.5 V bulk ‐ driven CMOS fully differential current feedback operational amplifier

Kumngern

Khateb

Kulej

2019

IET Circuits, Devices & Systems

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This study presents a new low-voltage fully differential current feedback operational amplifier for ultra-low-voltage and low-power analogue circuit applications. A bulk-driven technique is used to reduce the supply voltage requirement and also provides a rail-to-rail input voltage common-mode swing. The proposed circuit has been simulated using a TSMC 0.18 µm nwell CMOS technology with a 0.5 V supply voltage. Simulation results show that the static power consumption of the proposed circuit is 4.7 µW. The proposed circuit has been used to realise fully differential integrators and fully low-pass/band-pass second-order filters to express the performance of the new circuit.

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Floating parallel lossy inductance, parallel lossy capacitance, parallel C‐D, and lossless capacitance multiplier circuits using current feedback operational amplifiers

Bhaskar,

Shrivastava,

Raj

et al. 2023

Circuit Theory & Apps

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SummaryA new synthetic floating simulator topology is proposed which realizes lossy parallel inductance (R‐L), lossy parallel capacitance (R‐C), lossy parallel C‐D, and lossless floating capacitance multiplier (FCM) circuits using only three current feedback operational amplifiers (CFOA) as active elements and three impedances. In all the presented circuits, the value of L, C, and D is independently controllable through a single resistance without requiring any matching condition for passive elements. A novel feature of the proposed circuit involves a straightforward adjustment in the CFOA connections, allowing the circuit to function as either a floating lossless immittance simulator or a floating series‐type lossy immittance simulator. Various application examples of the presented circuits such as lead compensator, lag compensator, first‐order high‐pass filter, and fourth‐order Butterworth filter are also given to justify the theoretical analysis. To validate the workability of the proposed circuits, several analyses are conducted, including frequency analysis, transient analysis, Monte‐Carlo analysis, and temperature analysis, using the macro‐model of AD844 in the SPICE simulation tool. Experimental results of the parallel R‐L simulator and application examples are also provided using commercially available IC AD844‐type integrated CFOAs.

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New two-CFOA-based floating immittance simulators

Cited by 26 publications

References 67 publications

Design of Electronically Controllable Multifunction Active Filter with Amplitude Controllability Using Two Commercially Available ICs

Design of Electronically Controllable Multifunction Active Filter with Amplitude Controllability Using Two Commercially Available ICs

0.5 V bulk ‐ driven CMOS fully differential current feedback operational amplifier

Floating parallel lossy inductance, parallel lossy capacitance, parallel C‐D, and lossless capacitance multiplier circuits using current feedback operational amplifiers

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