Minimum Component All Pass Filters Using a New Versatile Active Element

2019 ◽  
Vol 29 (05) ◽  
pp. 2050078 ◽  
Author(s):  
Mohammad Faseehuddin ◽  
Jahariah Sampe ◽  
Sadia Shireen ◽  
Sawal Hamid Md Ali
Keyword(s):  
Integrated Circuits ◽  
Fourth Order ◽  
Active Element ◽  
Cmos Technology ◽  
Current Conveyor ◽  
Experimental Results ◽  
Pass Filter ◽  
Differential Input ◽  
Filter Structure ◽  
Transconductance Amplifier

In this paper, a new active element namely Dual-X current conveyor differential input transconductance amplifier (DXCCDITA) is proposed. The DXCCDITA is utilized in designing four minimum component fully cascadable all pass filter (APF) structures. The designed all pass filters require only single active element and one/two passive elements for realization thus making them a minimum component implementation. Two among the four presented all pass structures require only a single capacitor for implementation. A scheme for realizing nth order all pass filter is also suggested and a fourth order voltage mode (VM) filter is developed from the proposed scheme. The effect of non-idealities on the proposed all pass filters is also studied. A simple oscillator is also developed using one of the all pass filter structure. The oscillator required only one DXCCDITA, two capacitors and one resistor for implementation. The DXCCDITA is implemented in 0.35[Formula: see text][Formula: see text]m TSMC CMOS technology parameters and tested in Tanner EDA. Sufficient numbers of simulations are provided to establish the functionality of all pass structures. The experimental results using commercially available integrated circuits (ICs) are also provided.

scholarly journals CMOS CDBA-Based Inverse Filter Structure

2020 ◽  
Vol 9 (3) ◽  
pp. 2226-2231
Keyword(s):  
Cmos Technology ◽  
Experimental Results ◽  
Band Pass Filter ◽  
Inverse Filter ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Filter Structure ◽  
Low Pass ◽  
Band Pass ◽  
High Pass

This paper presents a voltage-mode(VM) tunable multifunction inverse filter configuration employing current differencing buffered amplifiers (CDBA). The presented structure utilizes two CDBAs, two/three capacitors and four/five resistors to realize inverse low pass filter (ILPF), inverse high pass filter (IHPF), inverse band pass filter (IBPF), and inverse band reject filter(IBRF) from the same circuit topology by suitable selection(s) of the branch admittances(s). PSPICE simulations have been performed with 0.18µm TSMC CMOS technology to validate the theory. Some sample experimental results have also been provided using off-the-shelf IC AD844 based CDBA.

Memristor Emulator Circuit Using Multiple-Output OTA and Its Experimental Results

2019 ◽  
Vol 28 (10) ◽  
pp. 1950166 ◽  
Author(s):  
Rajeev Kumar Ranjan ◽  
Pankaj Kumar Sharma ◽  
Sagar ◽  
Niranjan Raj ◽  
Bharti Kumari ◽  
...  
Keyword(s):  
Cmos Technology ◽  
Experimental Results ◽  
Active Device ◽  
Pass Filter ◽  
Transconductance Amplifier ◽  
Pinched Hysteresis Loop ◽  
A Charge ◽  
Memristor Emulator ◽  
High Pass ◽  
Pinched Hysteresis

A charge-controlled memristor emulator circuit based on one kind of active device [operational transconductance amplifier (OTA)] using CMOS technology is introduced in this paper. The proposed circuit can be configured in both incremental and decremental types by using a simple switch. The memristor behavior can be electronically tuned by adjusting the transconductance of the OTAs. By changing the value of the capacitor, the pinched hysteresis loop observed in the current versus voltage plane can be held at higher frequencies. The proposed emulator circuit functions well up to 500 kHz. The experiment has been performed using commercially available OTA ICs (CA3080). The experimental demonstration has been carried out for 10, 20 and 120[Formula: see text]kHz. A simple high-pass filter is explained in both configurations to demonstrate the functionality of the proposed memristor emulator. The proposed circuit has been simulated in PSPICE using 0.5-[Formula: see text]m CMOS parameter. The simulated and experimental results validate the theoretical proposition.

scholarly journals Operational Simulation of LC Ladder Filter Using VDTA

2017 ◽  
Vol 2017 ◽  
pp. 1-8
Author(s):  
Praveen Kumar ◽  
Neeta Pandey ◽  
Sajal Kumar Paul
Keyword(s):  
Experimental Verification ◽  
Close Agreement ◽  
Systematic Approach ◽  
Cmos Technology ◽  
Experimental Results ◽  
Pspice Simulation ◽  
Filter Structure ◽  
Transconductance Amplifier ◽  
Theoretical Predictions

In this paper, a systematic approach for implementing operational simulation of LC ladder filter using voltage differencing transconductance amplifier is presented. The proposed filter structure uses only grounded capacitor and possesses electronic tunability. PSPICE simulation using 180 nm CMOS technology parameter is carried out to verify the functionality of the presented approach. Experimental verification is also performed through commercially available IC LM13700/NS. Simulations and experimental results are found to be in close agreement with theoretical predictions.

scholarly journals Current Controlled Differential Difference Current Conveyor Transconductance Amplifier and Its Application as Wave Active Filter

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Neeta Pandey ◽  
Praveen Kumar ◽  
Jaya Choudhary
Keyword(s):  
Signal Processing ◽  
Cutoff Frequency ◽  
Cmos Technology ◽  
Bias Current ◽  
Active Filter ◽  
Current Conveyor ◽  
Third Order ◽  
Transconductance Amplifier ◽  
Wave Filter ◽  
Order Butterworth Filter

This paper proposes current controlled differential difference current conveyor transconductance amplifier (CCDDCCTA), a new active building block for analog signal processing. The functionality of the proposed block is verified via SPICE simulations using 0.25 μm TSMC CMOS technology parameters. The usefulness of the proposed element is demonstrated through an application, namely, wave filter. The CCDDCCTA-based wave equivalents are developed which use grounded capacitors and do not employ any resistors. The flexibility of terminal characteristics is utilized to suggest an alternate wave equivalents realization scheme which results in compact realization of wave filter. The feasibility of CCDDCCTA-based wave active filter is confirmed through simulation of a third-order Butterworth filter. The filter cutoff frequency can be tuned electronically via bias current.

scholarly journals Implementation of RC Oscillator with High-Q Frequency Selection using CCCII.

2019 ◽  
Vol 8 (12) ◽  
pp. 4470-4477
Keyword(s):  
Second Generation ◽  
Current Mode ◽  
Cmos Technology ◽  
Current Conveyor ◽  
Band Pass Filter ◽  
Phase Oscillators ◽  
Pass Filter ◽  
High Q ◽  
Voltage Mode ◽  
Band Pass

This article given a second generation current controlled current conveyor positive (CCCII+), second generation current controlled current conveyor negative (CCCII-), Quadrature oscillator with high-Q frequency choosing network and implementing completely different phase oscillators by employing (CCCII+) positive and (CCCII-) negative, and high band pass filter network, the approach is predicted on the CMOS technology . The root of this concept is, considering a customary voltage mode oscillator which consists of band pass filter with prime quality issue (high-Q) and voltage mode amplifier is transfigure into current mode oscillator by replacing tans-conductance amplifier. Because the loop of the oscillator is has lavish selectivity, the oscillator process less distortion. In addition 3dB bandwidth, oscillating condition, oscillation frequency of the oscillator could linearly, independently and electronically be tuned by adjusting the bias current of the (CCCII±)[1], lastly different simulations have been carried out to verify the linearity between output and input ports, range of frequency operations. These results can justify that the designed circuits are workable.

A New Method for Increasing Quality Factor in Active Filters

2017 ◽  
Vol 26 (09) ◽  
pp. 1750140 ◽  
Author(s):  
Abdullah Yesil ◽  
Firat Kacar
Keyword(s):  
Quality Factor ◽  
Intermediate Frequency ◽  
Current Conveyor ◽  
Active Filters ◽  
New Method ◽  
Center Frequency ◽  
Feedback Circuit ◽  
Filter Structure ◽  
Transconductance Amplifier ◽  
Differential Voltage Current Conveyor

In this paper, we present a new method increasing quality factor of active filter structure in the literature and a new designed filter. The new method is easily applied to all different filter modes with the proper feedback circuit. The center frequency of the filter remains constant as quality factor of filter increases. Also, quality factor can be also tuned electronically by changing the biasing current of the feedback circuit. Furthermore, the performance of the method is demonstrated by CMOS simulation of differential voltage current conveyor and transconductance amplifier. Quality factor value of the filter can also be easily adjusted electronically between 1 and 20 with the presented method. Finally, an application example of the presented method is presented for double tuned amplifier for intermediate frequency pre-amplifier of FM receiver.

scholarly journals VM and CM Universal Filters Based on Single DVCCTA

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Neeta Pandey ◽  
Sajal K. Paul
Keyword(s):  
Building Block ◽  
Current Mode ◽  
Cmos Technology ◽  
Current Conveyor ◽  
Spice Simulation ◽  
Transconductance Amplifier ◽  
Low Sensitivity ◽  
Differential Voltage Current Conveyor ◽  
A Current ◽  
Sensitivity Performance

A universal voltage-mode filter (VM) and a current-mode filter (CM) based on recently proposed active building block, namely, differential voltage current conveyor transconductance amplifier (DVCCTA) are proposed. Both the circuits use a single DVCCTA, two capacitors, and a single resistor. The filters enjoy low-sensitivity performance and low component spread and exhibit electronic tunability of filter parameters via bias currents of DVCCTA. SPICE simulation using 0.25 μm TSMC CMOS technology parameters is included to show the workability of the proposed circuits.

scholarly journals Differential Difference Current Conveyor Transconductance Amplifier: A New Analog Building Block for Signal Processing

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Neeta Pandey ◽  
Sajal K. Paul
Keyword(s):  
Signal Processing ◽  
Building Block ◽  
Current Mode ◽  
Cmos Technology ◽  
Current Conveyor ◽  
Pspice Simulations ◽  
Transconductance Amplifier ◽  
Multifunction Filter ◽  
And Performance ◽  
A Current

A new active building block for analog signal processing, namely, differential difference current conveyor transconductance amplifier (DDCCTA), is presented, and performance is checked through PSPICE simulations which show the usability of the proposed element is up to 201 MHz. The proposed block is implemented using 0.25 μm TSMC CMOS technology. Some of the applications are presented using the proposed DDCCTA, namely, a voltage mode multifunction filter, a current mode universal filter, an oscillator, current and voltage amplifiers, and grounded inductor simulator. The feasibility of DDCCTA and its applications is confirmed via PSPICE simulations.

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