scholarly journals Electronically Tunable Triple-Input Single-Output Voltage-Mode Biquadratic Filter Implemented with Single Integrated Circuit Package

2021 ◽  
Vol 6 (1) ◽  
pp. 1120-1127
Author(s):  
Natchanai Roongmuanpha ◽  
Taweepol Suesut ◽  
Worapong Tangsrirat
Keyword(s):  
Integrated Circuit ◽  
Output Voltage ◽  
Voltage Mode ◽  
Single Output ◽  
Biquadratic Filter ◽  
Electronically Tunable

scholarly journals Practical realization of electronically adjustable universal filter using commercially available IC-based VBDA

2020 ◽  
Vol 41 (3) ◽  
Author(s):  
Tattaya Pukkalanun ◽  
Worapong Tangsrirat ◽  
Natchanai Roongmuanpha
Keyword(s):  
Integrated Circuit ◽  
Practical Realization ◽  
Universal Filter ◽  
Voltage Mode ◽  
Filter Performance ◽  
Single Output ◽  
Transconductance Amplifier ◽  
Biquadratic Filter ◽  
Theoretical Finding ◽  
Electronically Tunable

This paper describes the practical realization of electronically adjustable voltage-mode universal filter with three inputs and single output (TISO) using the commercially available integrated circuit (IC)-based voltage differencing buffered amplifiers (VDBAs). The realization is resistor-less and contains only two VDBAs and two capacitors. The described filter structure can realize all the five standard biquadratic filter functions from the same configuration without needing any component matching criterions. It also exhibits low-output impedance, which enables for easy cascading in voltage-mode operation. Owing to practical VDBA realization, the filter circuit can be easily made electronically tunable with orthogonal o-Q tuning. The effects of the VDBA non-idealities on the filter performance have been analyzed in detail. To prove the theoretical finding, the performance of the studied circuit was also experimentally measured using the operational transconductance amplifier

scholarly journals Three-Input Single-Output Electronically Controllable Dual-Mode Universal Biquad Filter Using DO-CCCIIs

2007 ◽  
Vol 2007 ◽  
pp. 1-6 ◽  
Author(s):  
M. Siripruchyanun ◽  
W. Jaikla
Keyword(s):  
Integrated Circuit ◽  
Current Mode ◽  
Dual Mode ◽  
Voltage Mode ◽  
Single Output ◽  
Biquad Filter ◽  
Biquadratic Filter ◽  
Circuit Description ◽  
Electronically Controllable ◽  
The Given

This article presents a dual-mode (voltage-mode and current-mode) universal biquadratic filter performing completely standard functions: lowpass, highpass, bandpass, band-reject, and allpass functions, based on plus-type dual-output second-generation, current controlled, current conveyor (DO-CCCII+). The features of the circuit are that the bandwidth and natural frequency can be tuned electronically via the input bias currents: the circuit description is very simple, consisting of merely 2 DO-CCCIIs and 2 capacitors: the circuit can provide either the voltage-mode or current-mode filter without changing circuit topology. Additionally, each function response can be selected by suitably selecting input signals with digital method. Without any external resistors, the proposed circuit is very suitable to further develop into an integrated circuit. The PSPICE simulation results are depicted. The given results agree well with the theoretical anticipation. The maximum power consumption is approximately 1.81 mW at±1.5 V supply voltages.

scholarly journals Versatile Tunable Voltage-Mode Biquadratic Filter and Its Application in Quadrature Oscillator

Sensors ◽  
2019 ◽  
Vol 19 (10) ◽  
pp. 2349 ◽  
Author(s):  
San-Fu Wang ◽  
Hua-Pin Chen ◽  
Yitsen Ku ◽  
Yi-Chun Lin
Keyword(s):  
Input Voltage ◽  
Angular Frequency ◽  
Quadrature Oscillator ◽  
Voltage Mode ◽  
Single Output ◽  
Tuning Characteristic ◽  
Electronic Tuning ◽  
Biquadratic Filter ◽  
Single Input ◽  
Electronically Tunable

This paper presents a versatile tunable voltage-mode biquadratic filter with five inputs and three outputs. The proposed filter enjoys five single-ended output operational transconductance amplifiers (OTAs) and two grounded capacitors. The filter can be easily transformed into a quadrature oscillator. The filter with grounded capacitors is resistorless and electronically tunable. Either a voltage-mode five-input single-output biquadratic filter or a voltage-mode single-input three-output biquadratic filter can be operated by appropriate selecting input and output terminals. In the operation of five-input single-output biquadratic filter, the non-inverting lowpass, non-inverting bandpass, inverting bandpass, inverting highpass, non-inverting bandreject, inverting bandreject, and non-inverting allpass filtering responses can be realized by appropriately applying the input voltage signals. In the operation of single-input three-output biquadratic filter, the non-inverting/inverting lowpass, bandpass and bandreject filtering responses can be realized simultaneously. The circuit provides independent adjustment of the resonance angular frequency and quality factor, high-input impedance, and no inverting-type input voltage signals are imposed. The application in quadrature oscillator exhibits independent electronic tuning characteristic of the oscillation condition and the oscillation frequency. The theoretical analysis has been verified through OrCAD PSpice and furthermore by experimental measurements.

scholarly journals New Double Current Controlled CFA (DCC–CFA) Based Voltage–Mode Oscillator with Independent Electronic Control of Oscillation Condition and Frequency

2013 ◽  
Vol 64 (2) ◽  
pp. 65-75 ◽  
Author(s):  
Roman Šotner ◽  
Norbert Herencsár ◽  
Jan Jeřábek ◽  
Radek Dvořák ◽  
Aslihan Kartci ◽  
...  
Keyword(s):  
Integrated Circuit ◽  
Active Element ◽  
Frequency Tuning ◽  
Current Gain ◽  
Intrinsic Resistance ◽  
Current Feedback ◽  
Voltage Mode ◽  
Simultaneous Control ◽  
Bicmos Technology ◽  
Electronically Tunable

In this paper, a new electronically tunable quadrature oscillator (ETQO) based on two modified versions of current feedback amplifiers (CFAs), the so called double current controlled CFA (DCC-CFAs) is presented. The frequency of oscillation (FO) of the proposed voltage-mode (VM) ETQO is electronically adjustable by current gain or by varying the intrinsic resistance of the X terminal of the active element used. The condition of oscillation (CO) is adjustable by current gain independently with respect to frequency of oscillation. Simultaneous control of current gain and intrinsic resistance allows linear control of FO and provides extension of frequency tuning range. In the proposed circuit all the capacitors are grounded. The use of only grounded capacitors makes the proposed circuit ideal for integrated circuit implementation. The presented active element realized by using BiCMOS technology and the behavior of proposed circuit are discussed in details. The theoretical results are verified by SPICE simulations based on CMOS ON-Semi C5 0.5 μm and bipolar ultra high frequency transistor arrays Intersil HFA 3096 process parameters.

Five-inputs single-output voltage mode universal filter with high input and low output impedance using VDDDAs

Optik ◽  
2017 ◽  
Vol 128 ◽  
pp. 14-25 ◽  
Author(s):  
Surasak Sangyaem ◽  
Surapong Siripongdee ◽  
Winai Jaikla ◽  
Fabian Khateb
Keyword(s):  
Output Voltage ◽  
Output Impedance ◽  
Universal Filter ◽  
High Input ◽  
Voltage Mode ◽  
Single Output

scholarly journals Electronically Tunable TISO Voltage-Mode Universal Filter Using Two LT1228s

2021 ◽  
Vol 12 (1) ◽  
pp. 62-74
Author(s):  
May Phu Pwint Wai ◽  
Winai Jaikla ◽  
Surapong Siripongdee ◽  
Amornchai Chaichana ◽  
Peerawut Suwanjan
Keyword(s):  
Integrated Circuits ◽  
Harmonic Distortion ◽  
Input Voltage ◽  
Angular Frequency ◽  
Pass Band ◽  
Universal Filter ◽  
Voltage Mode ◽  
Single Output ◽  
Low Pass ◽  
Electronically Tunable

This study aims to design an electronically tunable voltage-mode (VM) universal filter utilizing commercially available LT1228 integrated circuits (ICs) with three-input and single-output (TISO) configuration. With the procedure based on two integrator loop filtering structures, the proposed filter consists of two LT1228s, four resistors, and two grounded capacitors. It realizes five filter output responses: low-pass, all-pass, band-reject, band-pass, and high-pass functions. By selecting input voltage signals, each output responses can be achieved without changing the circuit architecture. The natural angular frequency can be controlled electronically. The input voltage nodes Vin1 and Vin3 possess high impedance. The output node has low impedance, so it can be cascaded to other circuits. The performance of the proposed filter is corroborated by PSpice simulation and hardware implementation which support the theoretical assumptions. The result shows that the range of total harmonic distortion (THD) is lower than 1%, and that the higher the temperature is, the lower the natural angular frequency is.

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