scholarly journals Electronically Tunable Quadrature Sinusoidal Oscillator with Equal Output Amplitudes during Frequency Tuning Process

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Den Satipar ◽  
Pattana Intani ◽  
Winai Jaikla
Keyword(s):  
Frequency Tuning ◽  
Digital Circuit ◽  
Bias Current ◽  
Experimental Results ◽  
Current Conveyors ◽  
Active Device ◽  
Output Terminal ◽  
Sinusoidal Oscillator ◽  
Condition Of Oscillation ◽  
Electronically Tunable

A new configuration of voltage-mode quadrature sinusoidal oscillator is proposed. The proposed oscillator employs two voltage differencing current conveyors (VDCCs), two resistors, and two grounded capacitors. In this design, the use of multiple/dual output terminal active building block is not required. The tuning of frequency of oscillation (FO) can be done electronically by adjusting the bias current of active device without affecting condition of oscillation (CO). The electronic tuning can be done by controlling the bias current using a digital circuit. The amplitude of two sinusoidal outputs is equal when the frequency of oscillation is tuned. This makes the sinusoidal output voltages meet good total harmonic distortions (THD). Moreover, the proposed circuit can provide the sinusoidal output current with high impedance which is connected to external load or to another circuit without the use of buffer device. To confirm that the oscillator can generate the quadrature sinusoidal output signal, the experimental results using VDCC constructed from commercially available ICs are also included. The experimental results agree well with theoretical anticipation.

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 Electronically Tunable Sinusoidal Oscillator Circuit

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Sudhanshu Maheshwari ◽  
Rishabh Verma
Keyword(s):  
Frequency Tuning ◽  
Current Mode ◽  
Bias Current ◽  
Cmos Process ◽  
Third Order ◽  
Passive Components ◽  
Sinusoidal Oscillator ◽  
Wide Range ◽  
Tunable Frequency ◽  
Electronically Tunable

This paper presents a novel electronically tunable third-order sinusoidal oscillator synthesized from a simple topology, employing current-mode blocks. The circuit is realized using the active element: Current Controlled Conveyors (CCCIIs) and grounded passive components. The new circuit enjoys the advantages of noninteractive electronically tunable frequency of oscillation, use of grounded passive components, and the simultaneous availability of three sinusoidal voltage outputs. Bias current generation scheme is given for the active elements used. The circuit exhibits good high frequency performance. Nonideal and parasitic study has also been carried out. Wide range frequency tuning is shown with the bias current. The proposed theory is verified through extensive PSPICE simulations using 0.25 μm CMOS process parameters.

An Emitter Follower Sinusoidal Oscillator Circuit

1995 ◽  
Vol 32 (3) ◽  
pp. 265-272
Author(s):  
Muhammad Taher Abuelma'atti
Keyword(s):  
Experimental Results ◽  
Oscillator Circuit ◽  
Emitter Follower ◽  
Sinusoidal Oscillator ◽  
Condition Of Oscillation

An emitter follower sinusoidal oscillator circuit An emitter-follower oscillator circuit is analysed. Expressions for the frequency of oscillation and the condition of oscillation are obtained. Experimental results which confirm the theory are presented.

AN ELECTRONICALLY TUNABLE OSCILLATOR USING A SINGLE ACTIVE DEVICE AND TWO CAPACITORS

2008 ◽  
Vol 17 (05) ◽  
pp. 885-891 ◽  
Author(s):  
M. KOKSAL ◽  
M. SAGBAS ◽  
H. SEDEF
Keyword(s):  
Current Mode ◽  
Experimental Results ◽  
Current Mode Circuits ◽  
Active Device ◽  
Passive Components ◽  
Minimum Number ◽  
Electronically Tunable ◽  
A Current ◽  
Tunable Oscillator

A novel resistorless oscillator is presented. The proposed structure enjoys electronic tunability property with minimum number of active and passive components. This oscillator uses a current-mode (CM) active device and has properties of current mode circuits. The validity of the proposed circuit is verified by experimental results.

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.

Electronically Tunable Mixed Mode Quadrature Oscillator Using DX-MOCCII

2020 ◽  
pp. 2150006
Author(s):  
Ashok Kumar ◽  
Ajay Kumar Kushwaha ◽  
Sajal K. Paul
Keyword(s):  
Current Conveyors ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Current Output ◽  
Quadrature Oscillator ◽  
Three Phase ◽  
Condition Of Oscillation ◽  
Noise Frequency ◽  
Band Pass ◽  
Electronically Tunable

A new electronically tunable quadrature oscillator is presented using a biquad band pass filter. The new band pass filter is designed using two dual X second-generation multi-output current conveyors (DX-MOCCIIs), two grounded capacitors, two grounded resistors and one NMOS transistor working in the triode region. It is used to design a four-phase voltage and three-phase current output quadrature oscillator simultaneously. The frequency of the oscillator can be tuned externally through the MOS gate voltage without affecting the condition of oscillation. The phase noise, frequency stability and nonideality analysis are given. The functionality of the oscillator circuit has been confirmed by SPICE simulation and also hardware realization using commercially available IC AD844.

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 New Canonic Active RC Sinusoidal Oscillator Circuits Using Second-Generation Current Conveyors with Application as a Wide-Frequency Digitally Controlled Sinusoid Generator

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Abhirup Lahiri
Keyword(s):  
Second Generation ◽  
Frequency Tuning ◽  
Cmos Technology ◽  
Variable Frequency ◽  
Current Conveyors ◽  
Frequency Range ◽  
Passive Components ◽  
Sinusoidal Oscillator ◽  
Digitally Controlled ◽  
Cmos Implementation

This paper reports two new circuit topologies using second-generation current conveyors (CCIIs) for realizing variable frequency sinusoidal oscillators with minimum passive components. The proposed topologies in this paper provide new realizations of resistance-controlled and capacitor-controlled variable frequency oscillators (VFOs) using only four passive components. The first topology employs three CCIIs, while the second topology employs two CCIIs. The second topology provides an advantageous feature of frequency tuning through two grounded elements. Application of the proposed circuits as a wide-frequency range digitally controlled sinusoid generator is exhibited wherein the digital frequency control has been enabled by replacing both the capacitors by two identical variable binary capacitor banks tunable by means of the same binary code. SPICE simulations of the CMOS implementation of the oscillators using 0.35 μm TSMC CMOS technology parameters and bipolar implementation of the oscillators using process parameters for NR200N-2X (NPN) and PR200N-2X (PNP) of bipolar arrays ALA400-CBIC-R have validated their workability. One of the oscillators (with CMOS implementation) is exemplified as a digitally controlled sinusoid generator with frequency generation from 25 kHz to 6.36 MHz, achieved by switching capacitors and with power consumption of 7 mW in the entire operating frequency range.

scholarly journals New CFOA-Based Grounded-Capacitor Single-Element-Controlled Sinusoidal Oscillator

1997 ◽  
Vol 20 (2) ◽  
pp. 119-124 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Sa'ad Muhammad Al-Shahrani
Keyword(s):  
Experimental Results ◽  
Single Element ◽  
Oscillator Circuit ◽  
Sinusoidal Oscillator ◽  
Condition Of Oscillation

A new grounded-capacitor single-element-controlled CFOA-based sinusoidal oscillator circuit is presented. The circuit exploits to advantage the internal pole of a general CFOA and uses externally connected three resistors and two grounded capacitors. The frequency of oscillation and the condition of oscillation of the proposed circuit can be independently controlled. Experimental results are included.

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