Dual-Mode Quadrature Oscillator Using Current Follower Transconductance Amplifiers for GMI Sensors

2013 ◽  
Vol 712-715 ◽  
pp. 1886-1890
Author(s):  
Lei Zhang ◽  
Zhong Ming Pan
Keyword(s):  
Dual Mode ◽  
Transconductance Amplifier ◽  
Current Voltage ◽  
Sinusoidal Oscillator ◽  
Current Follower ◽  
Condition Of Oscillation ◽  
Transconductance Amplifiers ◽  
Passive Sensitivity ◽  
Quadrature Oscillators ◽  
Circuit Configuration

For designing GMI sensors, realization of current/voltage-mode (dual-mode) quadrature sinusoidal oscillator with the employment of current follower transconductance amplifier (CFTA) as the active component is presented. The proposed circuit configuration comprising two CFTAs, one grounded resistor and two grounded capacitors can simultaneously provide two explicit quadrature output currents and two quadrature output voltages. Moreover, the proposed circuit topology enjoys the advantage of independent control of the condition of oscillation and frequency of oscillation and good active and passive sensitivity performances. The functionality of the proposed quadrature oscillators has been verified by PSPICE simulations.

scholarly journals Active-Only Sinusoidal Oscillator with Electronically-Tunable Fully-Uncoupled Frequency and Condition of Oscillation

2001 ◽  
Vol 24 (4) ◽  
pp. 233-241 ◽  
Author(s):  
Muhammad Taher Abuelmaatti
Keyword(s):  
Second Generation ◽  
Operational Amplifiers ◽  
Current Conveyors ◽  
Oscillator Circuit ◽  
Operational Transconductance Amplifiers ◽  
Sinusoidal Oscillator ◽  
Condition Of Oscillation ◽  
Transconductance Amplifiers ◽  
Electronically Tunable

A new active-only sinusoidal oscillator is presented. The oscillator circuit uses two internally compensated operational amplifiers, two plus-type second-generation current conveyors and three operational transconductance amplifiers. The proposed circuit enjoys the attractive features of totally uncoupled frequency and condition of oscillation, low sensitivities, electronic tunability and integratability.

scholarly journals New Single-Resistor Controlled Sinusoidal Oscillator Circuit Using Unity-Gain Current Followers

1997 ◽  
Vol 20 (2) ◽  
pp. 105-109 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Hassan Al-Daghreer
Keyword(s):  
Experimental Results ◽  
Independent Control ◽  
Oscillator Circuit ◽  
Sinusoidal Oscillator ◽  
Current Follower ◽  
Condition Of Oscillation ◽  
Unity Gain

A new configuration for realizing current-follower-based sinusoidal oscillator is presented. The circuit uses two unity-gain current followers, three capacitors, and three resistors, and enjoys independent control of its frequency and condition of oscillation. Experimental results are included.

scholarly journals New Electronically Tunable Third Order Filters and Dual Mode Sinusoidal Oscillator Using VDTAs and Grounded Capacitors

2021 ◽  
Vol 6 (4) ◽  
pp. 262-281
Author(s):  
Tapas Kumar Paul ◽  
Radha Raman Pal
Keyword(s):  
Integrated Circuits ◽  
Current Mode ◽  
Third Order ◽  
Sinusoidal Oscillator ◽  
Condition Of Oscillation ◽  
Low Pass ◽  
Component Matching ◽  
Band Pass ◽  
Transconductance Amplifiers ◽  
Electronically Tunable

This study introduces a third order filter and a third order oscillator configuration. Both the circuits use two voltage difference transconductance amplifiers (VDTAs) and three grounded capacitors. By selecting the input and output terminals properly, current mode and transimpedance mode low-pass and band-pass filters can be obtained without component matching conditions. The natural frequency (ω0) can be tuned electronically. The oscillator circuit provides voltage and current outputs explicitly. The condition of oscillation (CO) and the frequency of oscillation (FO) can be adjusted orthogonally and electronically. The workability of the configurations is judged using TSMC CMOS 0.18 μm technology parameter as well as commercially available LM13700 integrated circuits (ICs). The simulation results show that: for ±0.9V power supply, the power consumption is 1.08 mW for both the configurations, while total harmonic distortions (THDs) are less than 2.06% and 2.17% for the filter and oscillator configurations, respectively.

scholarly journals Electronically Controllable Explicit Current Output Sinusoidal Oscillator Employing Single VDTA

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Dinesh Prasad ◽  
D. R. Bhaskar
Keyword(s):  
Current Mode ◽  
Frequency Stability ◽  
Good Frequency ◽  
View Point ◽  
Current Output ◽  
Transconductance Amplifier ◽  
Sinusoidal Oscillator ◽  
Condition Of Oscillation ◽  
Ready Availability ◽  
Electronically Controllable

A new current-mode sinusoidal oscillator employing a single voltage differencing transconductance amplifier (VDTA), two grounded capacitors, and one grounded resistor has been proposed. The proposed sinusoidal oscillator offers the following advantageous features: (i) use of grounded capacitors which are attractive from the view point of IC implementation as well as eliminating/accommodating parasitic capacitances, (ii) independent control of frequency of oscillation and condition of oscillation, (iii) ready availability of explicit current-mode output, (iv) low active and passive sensitivities, and (v) a very good frequency stability. The workability of the proposed configuration has been established by PSPICE simulations.

Current Mode and Voltage Mode Third Order Sinusoidal Oscillator Using CCDDCCTA

2020 ◽  
Vol 10 (4) ◽  
pp. 486-492
Author(s):  
Ajay K. Kushwaha ◽  
Ashok Kumar ◽  
Prakash Pareek
Keyword(s):  
Output Voltage ◽  
Current Mode ◽  
Monte Carlo Analysis ◽  
Bias Current ◽  
Current Conveyor ◽  
Output Current ◽  
Third Order ◽  
Transconductance Amplifier ◽  
Sinusoidal Oscillator ◽  
Circuit Configuration

Objective: In this paper, a novel third order sinusoidal oscillator based on current controlled differential difference current conveyor transconductance amplifier (CCDDCCTA) is proposed. Methods: The proposed circuit configuration consist of single CCDDCCTA, two grounded resistor and three capacitors. It can concurrently yield output voltage and current. The amplitude of output current can be easily tuned by the bias current. The non-ideality and Monte-Carlo analysis are discussed and presented. Results: The stated results agree well with the theoretical estimation. Conclusion: The performance ofa proposed oscillator are analyzed with ORCAD 16.6 simulator and the analog block has been depicted using 0.25 μm CMOS TSMC technology parameters.

scholarly journals Active-Only Sinusoidal Oscillator Circuits

2001 ◽  
Vol 24 (4) ◽  
pp. 223-232 ◽  
Author(s):  
Muhammad Taher Abuelmaatti ◽  
Muhammad Ali Al-Qahtani
Keyword(s):  
Operational Amplifier ◽  
Current Control ◽  
Current Feedback ◽  
Operational Transconductance Amplifiers ◽  
Sinusoidal Oscillator ◽  
Condition Of Oscillation ◽  
Transconductance Amplifiers ◽  
Current Feedback Operational Amplifier ◽  
Oscillator Circuits

Two new active-only sinusoidal oscillator circuits are proposed. The first circuit uses one current feedback operational amplifier (CFOA) and four operational transconductance amplifiers (OTAs). The second circuit uses only four OTAs. Without using any external passive elements, voltage (or current) control of the frequency and condition of oscillation, of the two circuits, can be achieved by adjusting the bias currents of the OTAs. The proposed circuits enjoy low sensitivities.

scholarly journals Dual-Mode Multifunctional Reconnection-Less Reconfigurable Filter

2020 ◽  
Vol 26 (3) ◽  
pp. 36-41
Author(s):  
Lukas Langhammer ◽  
Roman Sotner ◽  
Jan Dvorak ◽  
Tomas Dostal
Keyword(s):  
Quality Factor ◽  
Mixed Mode ◽  
Transfer Functions ◽  
Stop Band ◽  
Simulation Models ◽  
Current Mode ◽  
Dual Mode ◽  
Transconductance Amplifier ◽  
Current Follower ◽  
Band Pass

A novel solution of a reconnection-less reconfigurable filter is being presented. The filter works in the current mode, voltage mode, and mixed mode (voltage tocurrent) offering sixteen transfer functions in total. The structure utilizes a voltage differencing transconductance amplifier, current follower and voltage, and current amplifiers. The designed structure offers the control of the pole frequency and quality factor and the adjustment of the band-stop/band-pass area of available functions. The proposed design is supported by the PSpice simulations using available simulation models.

scholarly journals A Current Mode Universal Filter and a Single Resistance Controlled Oscillator Employing only Grounded Passive Elements: Applications of VDCC

2021 ◽  
Vol 25 (2) ◽  
pp. 65-76
Author(s):  
Tajinder Singh Arora ◽  
Keyword(s):  
Integrated Circuit ◽  
Current Mode ◽  
Paper Analysis ◽  
Current Conveyor ◽  
Universal Filter ◽  
Dual Mode ◽  
Passive Element ◽  
Research Article ◽  
Sinusoidal Oscillator ◽  
A Current

This research article explores the possible applications of voltage differencing current conveyor (VDCC), as a current mode universal filter and a sinusoidal oscillator. Without the need for an additional active/passive element, a very simple hardware modification makes it a dual-mode quadrature oscillator from the filter configuration. Both the proposed circuit requires only two VDCC and all grounded passive elements, hence a preferable choice for integration. The filter has some desirable features such as availability of all five explicit outputs, independent tunability of filter parameters. Availability of explicit quadrature current outputs, independence in start and frequency of oscillations, makes it a better oscillator design. Apart from prevalent CMOS simulation results, VDCC is also realized and experimentally tested using the off-the-shelf integrated circuit. All the pen and paper analysis such as non-ideal, sensitivity and parasitic analysis supports the design.

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