Analytical Synthesis of High-Pass, Band-Pass and Low-Pass Biquadratic Filters and its Quadrature Oscillator Application Using Current-Feedback Operational Amplifiers

Wang, San-Fu; Chen, Hua‐Pin; Ku, Young; Zhong, Ming-Xiu

doi:10.1109/access.2021.3050751

Cited by 23 publications

(40 citation statements)

References 45 publications

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“…The simulation results in Figs. [6][7][8][9][10][11] indicate that the proposed filter operates well as expected. The operational frequency is around 10 MHz.…”

Section: Simulation Resultssupporting

confidence: 66%

“…Table I compares the proposed multifunction biquad filter with recent biquad filters using ABBs implemented from the commercially available ICs [7]- [18]. The proposed filter and the circuits in [9], [12] are single input multiple output.…”

Section: Comparison and Discussionmentioning

confidence: 99%

“…The biquad filters in [7], [9], [11], [13], [15]- [17] are multiple input multiple output, and the filters in [8], [10], [14], [18] are multiple input single output configuration. The biquad multifunction filters in [8]- [10] are constructed from the different commercially available ICs.…”

Section: Comparison and Discussionmentioning

confidence: 99%

“…Equations ( 6) and (7) shows that the Q can be adjusted without disturbing the ω 0 by varying the voltage gain, K. Simultaneously adjusting the time constants a and b of the integrator circuits can control the ω 0 without affecting the Q. Then ω 0 and Q are independently controlled, where the Q can be adjusted by the voltage gain, K, and the ω 0 can be linearly adjusted by the time constants of both integrators.…”

Section: Synthesis Of Multifunction Filtermentioning

confidence: 99%

“…The voltage-mode multifunction biquadratic filters using ABB implemented from the commercially available ICs have been recently published in [7]- [19]. The biquad multifunction filters utilizing LT1228 as an active element were proposed in [12], [13], [15], [16].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Electronically and Orthogonally Tunable SITO Voltage-Mode Multifunction Biquad Filter Using LT1228s

Wai

Suwanjan

Jaikla

et al. 2021

ELEKTRON ELEKTROTECH

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The commercially available IC LT1228 is an interesting active device due to its advantage features, such as a fast transconductance amplifier, a wide bandwidth over a wide range of voltage gain, low total harmonic distortion (THD), high impedance differential input, etc. The single-input triple-output (SITO) voltage-mode (VM) multifunction biquadratic filters using ICs, LT1228s are introduced in this research. This circuit design provides the three-filtering functions, low-pass (LP), high-pass (HP), and band-pass (BP), without changing the circuit architecture. It comprises three LT1228s, four resistors, and two capacitors connected to the ground. The low impedance voltage output nodes are HP and BP responses. The quality factor (Q) and the pole frequency (ω0) can be electronically and orthogonally tuned by altering the third LT1228’s bias current (IB). The PSPICE simulation and the experiment are verified to describe the circuit operation.

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“…The simulation results in Figs. [6][7][8][9][10][11] indicate that the proposed filter operates well as expected. The operational frequency is around 10 MHz.…”

Section: Simulation Resultssupporting

confidence: 66%

Section: Comparison and Discussionmentioning

confidence: 99%

Section: Comparison and Discussionmentioning

confidence: 99%

Section: Synthesis Of Multifunction Filtermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Electronically and Orthogonally Tunable SITO Voltage-Mode Multifunction Biquad Filter Using LT1228s

Wai

Suwanjan

Jaikla

et al. 2021

ELEKTRON ELEKTROTECH

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Novel current feedback operational amplifier‐based configuration that realizes a single‐input multiple‐output‐type universal active filter and a single‐resistance‐controlled oscillator

Bhaskar

Raj

Senani

2022

Circuit Theory & Apps

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A new configuration employing five current feedback operational amplifiers (CFOAs), six resistors, and two grounded capacitors is proposed, which realizes a single-input-multiple-output (SIMO)-type voltage-mode (VM) universal active filter and a single-resistance-controlled oscillator (SRCO) and simultaneously provides the following novel features: (i) realizability of all the five generic filter functions namely, low pass filter (LPF), high pass filter (HPF), band pass filter (BPF), band reject filter (BRF), and all pass filter (APF) at the five output terminals of the five CFOAs; (ii) infinite input impedance and zero output impedance in all the realizations; (iii) availability of orthogonal tunability of the filter parameters (pole frequency, quality factor/BW, and gain);

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Current feedback operational amplifier‐based fully orthogonal universal and multifunction filters

Dogan,

Minayi,

Yuce

et al. 2024

Circuit Theory & Apps

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SummaryThis paper introduces a second‐order voltage‐mode (VM) multiple‐input single‐output (MISO) universal filter and a second‐order current‐mode (CM) single‐input multiple‐output (SIMO) multifunction filter. The introduced VM MISO universal filter includes a single current feedback operational amplifier (CFOA) and a single voltage follower as active elements, while the introduced CM SIMO multifunction filter contains two CFOAs. Both introduced circuits are orthogonally controllable. In other words, the quality factors can be controlled through a single resistor without affecting the resonance frequencies. Both circuits have low sensitivities and no passive element‐matching conditions. The introduced VM MISO universal filter has a low output impedance. Moreover, to extract the output currents of the proposed CM SIMO from high impedance terminals, second‐generation current conveyor‐based version of the circuit is introduced. Simulations are made through the PSPICE program, where 0.13‐μm IBM CMOS technology parameters are utilized. DC supply voltages are selected as ±0.9 V. In the experiments, AD844s are used, and DC supply voltages are chosen as ±7.5 V.

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Analytical Synthesis of High-Pass, Band-Pass and Low-Pass Biquadratic Filters and its Quadrature Oscillator Application Using Current-Feedback Operational Amplifiers

Cited by 23 publications

References 45 publications

Electronically and Orthogonally Tunable SITO Voltage-Mode Multifunction Biquad Filter Using LT1228s

Electronically and Orthogonally Tunable SITO Voltage-Mode Multifunction Biquad Filter Using LT1228s

Novel current feedback operational amplifier‐based configuration that realizes a single‐input multiple‐output‐type universal active filter and a single‐resistance‐controlled oscillator

Current feedback operational amplifier‐based fully orthogonal universal and multifunction filters

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