scholarly journals Dual Output Sinusoidal Oscillator Using Second Generation Current Controlled Conveyor

2019 ◽  
Vol 23 (2) ◽  
Author(s):  
Avireni Srinivasulu ◽  
Syed Zahiruddin ◽  
Musala Sarada
Keyword(s):  
Integrated Circuits ◽  
Second Generation ◽  
Supply Voltage ◽  
Harmonic Distortion ◽  
Current Feedback ◽  
Transconductance Amplifier ◽  
Sinusoidal Oscillator ◽  
Montecarlo Method ◽  
Current Feedback Operational Amplifier ◽  
Low Supply Voltage

Second Generation Current Controlled Conveyor (CCCII) based tunable Dual Output Sinusoidal Oscillator (MSO) is proposed. It consists of three CCCIIs, a resistor and two grounded capacitors. By tuning external DC bias current, the oscillator frequency and commencement of its oscillations are controlled electronically. The proposed circuit is verified using PSPICE simulator and also on laboratory breadboard using commercially available integrated circuits Current Feedback Operational Amplifier (AD844AN) and Operational Transconductance Amplifier (LM13600) at a supply rail voltage of ±6 V. Further its nonlinearities, sensitivities, performance characteristics are also verified. Comparison of the proposed topology with the ongoing methods are also undertaken. PSPICE simulation results are verified with a low supply voltage of ±1 V, temperature analysis, analysis by using Montecarlo method and finally Total Harmonic Distortion (THD) is also demonstrated.

scholarly journals Synthesis of a Novel Low-Component Programmable Sinusoidal Oscillator

2003 ◽  
Vol 26 (1) ◽  
pp. 31-36 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Sa'ad Muhammad Al-Shahrani
Keyword(s):  
Excellent Agreement ◽  
Operational Amplifier ◽  
Operational Transconductance Amplifier ◽  
Current Feedback ◽  
Transconductance Amplifier ◽  
Sinusoidal Oscillator ◽  
Current Feedback Operational Amplifier ◽  
Synthesis Approach

A novel circuit is presented for realizing a sinusoidal oscillator. The proposed circuit, developed through a true synthesis approach, uses one current-feedback operational amplifier (CFOA), one operational transconductance amplifier (OTA), three grounded capacitors and one floating resistor. The proposed circuit enjoys several attractive features. Practical results, in excellent agreement with the presented theory, are included.

scholarly journals Electronically Tunable Full Wave Precision Rectifier Using DVCCTAs

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1262
Author(s):  
Niranjan Raj ◽  
Sagar ◽  
Rajeev Kumar Ranjan ◽  
Bindu Priyadarshini ◽  
Nicu Bizon
Keyword(s):  
Low Voltage ◽  
Supply Voltage ◽  
Current Feedback ◽  
Chip Area ◽  
Full Wave ◽  
Transconductance Amplifier ◽  
Functional Correctness ◽  
Current Feedback Operational Amplifier ◽  
Electronically Tunable ◽  
Nmos Transistors

This work presents a voltage mode scheme of a full-wave precision rectifier circuit using an analog building block differential voltage current conveyor transconductance amplifier (DVCCTA) including five NMOS transistors. The proposed design is essentially suited for low voltage and high-frequency input signals. The operation of the proposed rectifier design depends upon the region of operation of NMOS transistors. The output waveform of the presented rectifier design can be made electronically tunable by controlling the bias voltage. The functional correctness and verification of the presented design are performed using 0.25-µm TSMC technology under the supply voltage of ±1.5 V. The absence of a resistor leads to a minimal parasitic effect. To obtain further insight on the robustness of the circuit, a Monte Carlo simulation and corner analysis are also presented. The circuit is verified experimentally by incorporating a breadboard model with the help of commercially available ICs CA3080 (operational transconductance amplifier) and AD844AN (current feedback operational amplifier) and offers remarkable compliance with both theoretical and simulation outcomes. The presented design has been laid out on Cadence virtuoso, which consumes a chip area of 9044 µm2.

Passive Components for RF-ICs

2012 ◽  
pp. 189-214
Author(s):  
Gianluca Cornetta ◽  
David J. Santos ◽  
José Manuel Vázquez
Keyword(s):  
Integrated Circuits ◽  
Quality Factor ◽  
Silicon Substrate ◽  
Supply Voltage ◽  
Magnetic Behavior ◽  
Low Noise ◽  
Low Noise Amplifiers ◽  
Fully Integrated ◽  
Core Elements ◽  
Low Supply Voltage

The modern wireless communication industry is demanding transceivers with a high integration level operating in the gigahertz frequency range. This, in turn, has prompted intense research in the area of monolithic passive devices. Modern fabrication processes now provide the capability to integrate onto a silicon substrate inductors and capacitors, enabling a broad range of new applications. Inductors and capacitors are the core elements of many circuits, including low-noise amplifiers, power amplifiers, baluns, mixers, and oscillators, as well as fully-integrated matching networks. While the behavior and the modeling of integrated capacitors are well understood, the design of an integrated inductor is still a challenging task since its magnetic behavior is hard to predict accurately. As the operating frequency approaches the gigahertz range, device nonlinearities, coupling effects, and skin effect dominate, making difficult the design of critical parameters such as the self-resonant frequency, the quality factor, and self and mutual inductances. However, despite the parasitic effects and the low quality-factor, integrated inductors still allow for the implementation of integrated circuits with improved performances under low supply voltage. In this chapter, the authors review the technology behind monolithic capacitors and inductors on silicon substrate for high-frequency applications, with major emphasis on physical implementation and modeling.

A Novel Floating/Grounded Meminductor Emulator

2020 ◽  
Vol 29 (15) ◽  
pp. 2050247 ◽  
Author(s):  
Hasan Sozen ◽  
Ugur Cam
Keyword(s):  
Hysteresis Loop ◽  
Operational Amplifier ◽  
Current Conveyors ◽  
Current Feedback ◽  
Transconductance Amplifier ◽  
Additional Control ◽  
Pinched Hysteresis Loop ◽  
Terminal Element ◽  
Current Feedback Operational Amplifier ◽  
Pinched Hysteresis

Meminductor is a nonlinear two-terminal element with storage energy and memory ability. To date, meminductor element is not available commercially as memristor and memcapacitor are. Therefore, it is of great significance to implement a meminductor emulator for breadboard experiment. In this paper, a flux-controlled floating/grounded meminductor emulator without a memristor is presented. It is built with commercially available off-the-shelf electronic devices. It consists of single operational transconductance amplifier (OTA), single multiplier, two second-generation current conveyors (CCIIs), single current-feedback operational amplifier (CFOA) and single operational amplifier. Using OTA device introduces an additional control parameter besides frequency and amplitude values of applied voltage to control the area of pinched hysteresis loop of meminductor. Mathematical model of proposed emulator circuit is given to describe the behavior of meminductor circuit. The breadboard experiment is performed using CA3080, AD844, AD633J and LM741 for OTA, CCII–CFOA, multiplier and operational amplifier, respectively. Simulation and experimental test results are given to verify the theoretical analyses. Frequency-dependent pinched hysteresis loop is maintained up to 5 kHz. The presented meminductor emulator tends to work as ordinary inductor for higher frequencies.

scholarly journals A Minimum Component Grounded-Capacitor CFOA-Based RC Oscillator

1997 ◽  
Vol 19 (4) ◽  
pp. 247-251 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Sa'ad Muhammad Al-Shahrani
Keyword(s):  
Operational Amplifier ◽  
Single Frequency ◽  
Current Feedback ◽  
Oscillator Circuit ◽  
Sinusoidal Oscillator ◽  
Passive Sensitivity ◽  
Current Feedback Operational Amplifier

A minimum-component grounded-capacitor single-frequency RC-sinusoidal oscillator circuit using the current feedback operational amplifier (CFOA) is presented. The circuit uses a single CFOA, two resistors, and two grounded capacitors. The circuit enjoys low active and passive sensitivity characteristics.

LOW VOLTAGE, LOW POWER CHEBYSHEV FILTER IN 0.18 μm CMOS TECHNOLOGY

2013 ◽  
Vol 22 (07) ◽  
pp. 1350053 ◽  
Author(s):  
S. REKHA ◽  
T. LAXMINIDHI
Keyword(s):  
Low Power ◽  
Dynamic Range ◽  
Low Voltage ◽  
Supply Voltage ◽  
Cmos Technology ◽  
Transconductance Amplifier ◽  
Low Pass ◽  
Unity Gain ◽  
Design Centering ◽  
Low Supply Voltage

This paper presents an active-RC continuous time filter in 0.18 μm standard CMOS technology intended to operate on a very low supply voltage of 0.5 V. The filter designed, has a 5th order Chebyshev low pass response with a bandwidth of 477 kHz and 1-dB passband ripple. A low-power operational transconductance amplifier (OTA) is designed which makes the filter realizable. The OTA uses bulk-driven input transistors and feed-forward compensation in order to increase the Dynamic Range and Unity Gain Bandwidth, respectively. The paper also presents an equivalent circuit of the OTA and explains how the filter can be modeled using descriptor state-space equations which will be used for design centering the filter in the presence of parasitics. The designed filter offers a dynamic range of 51.3 dB while consuming a power of 237 μW.

scholarly journals Silicon Photomultiplier Sensor Interface Based on a Discrete Second Generation Voltage Conveyor

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 2042
Author(s):  
Vincenzo Stornelli ◽  
Leonardo Pantoli ◽  
Gianluca Barile ◽  
Alfiero Leoni ◽  
Emanuele D’Amico
Keyword(s):  
Integrated Circuits ◽  
Second Generation ◽  
Supply Voltage ◽  
Discrete Elements ◽  
Silicon Photomultiplier ◽  
Silicon Photomultipliers ◽  
Sensor Interface ◽  
Reduced Dimensions ◽  
Complete Circuit ◽  
Very High

This work presents the design of a discrete second-generation voltage conveyor (VCII) and its capability to be used as electronic interface for silicon photomultipliers. The design addressed here exploits directly at the transistor level, with commercial components, the proposed interface; the obtained performance is valuable considering both the discrete elements and the application. The architecture adopted here realizes a transimpedance amplifier that is also able to drive very high input impedance, as usually requested by photons detection. Schematic and circuital design of the discrete second-generation voltage conveyor is presented and discussed. The complete circuit interface requires a bias current of 20 mA with a dual 5V supply voltage; it has a useful bandwidth of about 106 MHz, and considering also the reduced dimensions, it is a good candidate to be used in portable applications without the need of high-cost dedicated integrated circuits.

scholarly journals New Grounded-Capacitor Sinusoidal Oscillators Using the Current-Feedback-Amplifier Pole

1998 ◽  
Vol 21 (1) ◽  
pp. 23-32 ◽  
Author(s):  
Muhammad Taher Abuelma’atti ◽  
Husain Abdullah Al-Zaher
Keyword(s):  
Operational Amplifier ◽  
Experimental Results ◽  
Current Feedback ◽  
Sinusoidal Oscillators ◽  
Feedback Amplifier ◽  
Current Feedback Amplifier ◽  
Sinusoidal Oscillator ◽  
Current Feedback Operational Amplifier ◽  
Oscillator Circuits

New current-feedback-operational amplifier (CFOA)-pole-based sinusoidal oscillator circuits are presented. Each circuit uses two CFOAs, two (or three) grounded capacitors and/or resistors. Experimental results are included.

An Ultra-Low-Voltage Low-Power Current-Mode True RMS-to-DC Converter

2016 ◽  
Vol 25 (06) ◽  
pp. 1650066 ◽  
Author(s):  
Pantre Kompitaya ◽  
Khanittha Kaewdang
Keyword(s):  
Integrated Circuits ◽  
Low Power ◽  
High Performance ◽  
Dynamic Range ◽  
Low Voltage ◽  
Supply Voltage ◽  
Circuit Complexity ◽  
Current Mode ◽  
Cmos Technology ◽  
Low Supply Voltage

A current-mode CMOS true RMS-to-DC (RMS: root-mean-square) converter with very low voltage and low power is proposed in this paper. The design techniques are based on the implicit computation and translinear principle by using CMOS transistors that operate in the weak inversion region. The circuit can operate for two-quadrant input current with wide input dynamic range (0.4–500[Formula: see text]nA) with an error of less than 1%. Furthermore, its features are very low supply voltage (0.8[Formula: see text]V), very low power consumption ([Formula: see text]0.2[Formula: see text]nW) and low circuit complexity that is suitable for integrated circuits (ICs). The proposed circuit is designed using standard 0.18[Formula: see text][Formula: see text]m CMOS technology and the HSPICE simulation results show the high performance of the circuit and confirm the validity of the proposed design technique.

A New Tune-Dependent Multiple-Gated Transistor Linearization Technique

2019 ◽  
Vol 29 (07) ◽  
pp. 2050103
Author(s):  
Farzan Rezaei
Keyword(s):  
Supply Voltage ◽  
Harmonic Distortion ◽  
Input Voltage ◽  
Third Order ◽  
Linearization Technique ◽  
Text Input ◽  
Transconductance Amplifier ◽  
Wide Range ◽  
Low Pass ◽  
Differential Pair

In this paper, a new multiple-gated transistor (MGTR) linearization technique is presented. To simultaneously keep linearity and tuning capability of proposed operational transconductance amplifier (OTA), the auxiliary transistors which are employed for [Formula: see text] cancellation of differential pair (DP) stage are body-driven through a tune-dependent voltage. By this way, the third-order nonlinearity of DP is reduced for a wide range of transconductance values from 5.1 to 35.6[Formula: see text][Formula: see text]A/V. The OTA works with 1.2[Formula: see text]V supply voltage and its power consumption changes between 137.4 and 156[Formula: see text][Formula: see text]W at the entire tuning range. For [Formula: see text][Formula: see text][Formula: see text]A/V ([Formula: see text][Formula: see text]V) and for 0.6[Formula: see text][Formula: see text] input voltage, the simulation results show 6[Formula: see text]dB reduction in the total harmonic distortion (THD) of proposed OTA when the MGTR linearization technique is used and 15[Formula: see text]dB reduction when the tune-dependent body driving is also utilized. The proposed OTA is employed in a third-order low-pass Butterworth filter which is tunable from 2 to 18[Formula: see text]MHz. The in-band IIP3 of filter is 16.9 and 12.4[Formula: see text]dBm, respectively, for 2 and 18[Formula: see text]MHz cutoff frequencies while the two-tone input voltage is applied at 1[Formula: see text]MHz.

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