A routine circuit analysis of figure 2 yields the following. The oscillator circuit provides independent control of oscillation frequency without disturbing oscillation condition by a resistor. It is suitable for ic implementation due to use of grounded capacitors. Novel single resistance controlled sinusoidal oscillator. Two of the oscillators are set at fixed frequencies and one oscillator can have its frequency varied through a small range. Single resistance controlled voltagemode sinusoidal oscillator kanhaiya lal pushkar1, ghanshyam singh2, rajendra kumar goel1 1department of electronics and communication engineering, maharaja agrasen institute of technology, new delhi, india. Voltage controlled oscillator university of kansas. This study presents findings of a search on canonic single resistance controlled oscillators srcos using third generation current conveyors cciiis. Wien bridge sine wave oscillator generator the op amp wien bridge sine wave oscillator or generator is an excellent circuit for generating a sine wave signal at audio frequencies and above. A new singleresistancecontrolled sinusoidal oscillator using two fourterminal floating nullors ftfns is presented. Natural resistance in the circuit and in the quartz crystal filter out all the unwanted frequencies. The performance of the oscillator has been verified by using hspice simulation.
The proposed oscillator employs only one voltage differencing differential input buffered amplifier vddiba, two resistors, and two grounded capacitors. A novel variable frequency sinusoidal oscillator using a single current conveyor. If a sinusoidal output is required, the conditions that must be satisfied to generate this waveform can be determined from the linear feedback theory presented in earlier chapters. Current mode sinusoidal quadrature oscillator using current. Pdf in this communication, a new singleresistance controlled sinusoidal oscillator srco has been presented. Bhaskar, 2 anddineshprasad 2 department of electronics and communication engineering, maharaja agrasen institute of technology, rohini, new delhi, india. Thus, minimum numbers of passive components are used to devise a canonic sinusoidal oscillator. The proposed oscillator employs two voltage differencing current conveyors vdccs, two resistors, and two grounded capacitors. Current feedback opamp based linear voltagecontrolled.
For hartley oscillator both x2 and x1 are inductors whereas for colpitts oscillators both are capacitors. Realisation of singleresistancecontrolled sinusoidal oscillator. To the best knowledge of author, this is the first oscillator constructed with single otra. A novel singleresistancecontrolled sinusoidal oscillator. A new configuration of voltagemode quadrature sinusoidal oscillator is proposed. Pdf realization of singleresistancecontrolled sinusoidal. A sine wave is obtained by appropriate shaping a triangular waveform. In this design, the use of multipledual output terminal active building block is not required. The proposed circuit provides voltage and current outputs to achieve dm operation. New vddibabased singleresistancecontrolled sinusoidal. Vdvta based sinusoidal oscillator 3,vdta based sinusoidal oscillator 5, voltage controlled oscillator 7, lc oscillator 820, single resistance controlled oscillator 9,otra based sinusoidal oscillator 1212 is a recently reported versatile active building block used in the realization of analog signal processing circuits.
In lab you will have a chance to consider both a sinusoidal oscillator the socalled colpitts oscillator, named after its inventor and a relaxationtype oscillator. Two new singleresistorcontrolled quadrature sinusoidal. Pdf singleresistancecontrolled sinusoidal oscillator using. Recursive discretetime sinusoidal oscillators e veryfewyearsanarticle emerges thatpresents a method for generating sinusoidal functions with a digital signal processor dsp. Twint oscillator qgenerally, rc feedback oscillators are used for frequencies up to about 1 mhz. Separate single resistors can control both oscillation condition and the. Cmos vdibasbased singleresistancecontrolled voltagemode. Single resistancecontrolled sinusoidal oscillators employing. Additional realizations of singleelementcontrolled.
The proposed configuration offers the following advantageous features. Pdf this paper presents a new singleresistancecontrolled sinusoidal oscillator srco. 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 dcccfas is presented. Pdf single resistancecontrolled sinusoidal oscillators. For example, in a transverse wave traveling along a string, each point in the string oscillates back and forth in the transverse direction not along the direction of the string. An untuned or oscillator uses nonlinear feedback and is generally nonsinusoidal. In this article, we present this particular circuit. The proposed srco employs single universal voltage conveyor, three resistors, and two capacitors. Singleresistancecontrolled sinusoidal oscillator using single vd. The presented singleresistancecontrolled sinusoidal oscillator circuit is shown. Cmos realization of otra based electronically controllable.
Explain how the correct amount of phase shift is always provided in the feedback circuit to ensure that the nature of the feedback is always regenerative, not degenerative. Cfoa based mosc single resistance controlled sinusoidal. Electronically tunable quadrature sinusoidal oscillator with. A new single resistance controlled src sinusoidal oscillator using single voltage differencingdifferential input buffered amplifier vddiba, only four passive components two capacitors and two resistors, is presented. The oscillator circuit provides independent control of oscillation frequency without disturbing oscillation condition. Realisation of single resistance controlled sinusoidal oscillator. Tuned oscillator circuits tuned oscillators use a parallel lc resonant circuit lc tank to provide the oscillations.
A new oscillator has been introduced which offers the following features. Single resistance controlled oscillators employing a single differential difference complementary current conveyor by selcuk kilinc, varun jain, varun aggarwal, ugur cam abstract a set of fourteen currentmode sinusoidal oscillators employing a single differential difference complementary current conveyor ddccc is proposed. The oscillator feedback loop a basic structure of a sinusoidal oscillator consists of an amplifier and a frequencyselective network connected in a positivefeedback loop. Research article single resistance controlled sinusoidal oscillator using single vddiba k. While each oscillator structure has been developed pretty much on its own, a simple overlying theory has not been presented that unifies all of the vari. Realization of single resistance controlled sinusoidal oscillator.
A voltage controlled oscillator is a rather simple device in theoryits simply an oscillator whose frequency is related to a control voltage. Grounded resistancecapacitance controlled sinusoidal oscillators using operational transresistance amplifier. Cmos realization of singleresistancecontrolled and. Singleresistancecontrolledvoltagecontrolled oscillator. Singleresistancecontrolled sinusoidal oscillator pdf.
A new application of the cdta article pdf available in wseas transactions on electronics 56 january 2008 with 45 reads. Design and analysis of cciibased oscillator with amplitude stabilization employing optocouplers for linear voltage control of the output frequency roman sotner 1,2, id, jan jerabek 2, lukas langhammer 1,2 and jan dvorak 2 1 department of radio electronics, faculty of electrical engineering and communication, brno university of. In the rc oscillator tutorial we saw that a number of resistors and capacitors can be connected together with an inverting amplifier to produce an oscillating circuit one of the simplest sine wave oscillators which uses a rc network in place of the conventional lc tuned tank circuit to produce a sinusoidal output waveform, is called a wien bridge oscillator. Pdf cmos vdibasbased singleresistancecontrolled voltage. The first proposed circuit is a minimum component rc sinusoidal oscillator circuit with one otra and. Singh, singleelementcontrolled sinusoidal oscillator employing a single current conveyor ic, electronics letters, vol. We know that oscillator circuits require regenerative feedback in order to continuously sustain oscillation. It is a circuit that produces a repetitive waveform on its output with only dc supply as input. The waveforms in relaxation oscillators are generated from sine waves that are summed to provide a specified shape.
A class of second order sinusoidal oscillators is presented which employs a single current feedbackoperational amplifier, four capacitors and four to five resistors which can be realized by cmos linear voltage controlled resistors vcr. Cmos vdibasbased singleresistancecontrolled voltage. Singleresistancecontrolled sinusoidal oscillators srcos play an. In this paper single resistance controlled sinusoidal oscillator srco is designed that realizes oscillation responses and does not involve any component matching constraints. To the best knowledge of the authors, no such single cfoabased sinusoidal oscillator has been explicitly. Sinusoidal oscillators tutorial pdf version quick guide resources job search discussion in this tutorial, we will discuss the important features of different types of sinusoidal oscillators, starting from their basic working principle to their circuit arrangement and behavior. Catalogue of variable frequency and singleresistance. Thirdorder sinusoidal oscillator using a single cmos operational.
A new circuit configuration for the realization of a single resistance controlled sinusoidal oscillator is presented which uses only one positive four terminal floating nullor pftfn along with two grounded capacitors and five resistors and offers independent control of the frequency of oscillation as well as the condition of oscillation through separate resistors. Design of op amp sine wave oscillators criteria for oscillation the canonical form of a feedback system1 is shown in figure 1, and equation 1 describes the performance of any feedback system an amplifier with passive feedback components constitutes a feedback system. New canonic single resistance controlled sinusoidal oscillator using a single current conveyor. The governing laws for the condition of oscillation co and the frequency of oscillation fo are single resistance controlled src and which allow independent fo tuning.
Find out the value of inductor needed with a capacitor of 47 pf for a tuned lc oscillator frequency of 22. Improved groundedcapacitor srco using only a single pftfn. Sinusoidal oscillators play an important role in instrumentation, communication and signal processing applications. Colpitts the resonant circuit is an inductor and two capacitors. It is free from internal parasitics of cfoa, because internal parasitics resistance and capacitor is connected with cfoas zpin.
This paper reports a new realization of linear voltage controlled oscillator vco using three currentfeedback opamps cfoas, three analog multipliers, and only four passive components. Unlike previously reported srcbased sinusoidal oscillators. The tuning of frequency of oscillation fo can be done electronically by adjusting the. Oct 31, 2019 the proposed oscillator employs only one voltage differencing differential 27 mar 20 singleresistancecontrolled sinusoidal oscillators srcos play an. Research article singleresistancecontrolled sinusoidal. Outputs of two sinusoidal with 90 phase difference are available. Because of the groundedcapacitors, the configuration is suitable for ic implementation. Single resistance controlled sinusoidal oscillators employing current differencing buffered amplifier.
Singleresistancecontrolled oscillators employing a single differential difference complementary current conveyor by selcuk kilinc, varun jain, varun aggarwal, ugur cam abstract a set of fourteen currentmode sinusoidal oscillators employing a single differential difference complementary current conveyor ddccc is proposed. This paper presents a new single resistance controlled sinusoidal oscillator srco. The proposed configuration offers the following advantageous features 1 independent control of condition of oscillation and frequency of oscillation. The research conducted on the single ota rc oscillator demonstrated that there are advantages in using this circuit rather than others. Design and analysis of cciibased oscillator with amplitude. In this paper, a new single resistance controlled sinusoidal oscillator srco using single universal voltage conveyor uvc has been presented. General configuration of the cdba based single resistance controlled oscillator. Vco fundamentals first order behavior tuning voltage v tune controls output frequency specify by minmax range of fosc, v tune performance limitations linearity of tuning characteristic spectral purity. The oscillator is based on the cascade of lossless and lossy integrators in loop.
The proposed oscillator employs only one voltage differencing differential 27 mar 20 single resistance controlled sinusoidal oscillators srcos play an. Singleresistancecontrolled sinusoidal oscillator using. Currenr conveyors, volragr sinusoidal oscillators is presented which employs a single current feedbackoperational amplifier, four capacitors and four to five resistors which can be realized by cmos linear voltage controlled resistors vcr. Current mode sinusoidal quadrature oscillator using. For any type of circuit to behave as an oscillator, first it must satisfy the necessary and sufficient condition which is mentioned in the previous section. On the realisation of canonic singleresistancecontrolled. Singleelementcontrolled sinusoidal oscillator employing. Tanjareon,currentmode sinusoidal quadrature oscillator with independent control of oscillation frequency and condition using cdtas, indian journal of. A new single resistance controlled quadrature oscillator using two current differencing buffered amplifiers cdbas, four resistors and two grounded capacitors is presented. Singleresistance controlled sinusoidal oscillator employing. Realisation of singleresistancecontrolled sinusoidal. The hartley oscillator is a particularly useful circuit for producing good quality sine wave signals in the rf range, 30khz to 30mhz although at the higher limits of this range and above, the colpitts oscillator is usually preferred. The proposed circuits are simultaneously single resistance controlled oscillators srco as well as single capacitor controlled oscillators scco providing.
Quartz is amongst one of the most common minerals in the earths continental crust. Senani, new currentconveyorbased single resistancecontrolled voltage controlled oscillator employing. From seven identified canonic srcos, five are completely new. Single resistancecontrolled sinusoidal oscillators employing current differencing buffered amplifier author links open overlay panel s.
The proposed circuit is realised through the employment of two cdbas, three resistors and two grounded capacitors. Single resistancecontrolled sinusoidal oscillators. Novel singlecfoabased sinusoidal oscillator capable of. Hartley the resonant circuit is a tapped inductor or two inductors and one capacitor. Department of electronics and communication engineering. Cmos realization of singleresistancecontrolled and variable. The proposed structure provides the following advantageous features.
Positive feedback amplifiers oscillators lc and crystal. The name sinusoidal oscillator itself indicates the meaning that this oscillator produces sine wave output. Grounded resistancecapacitancecontrolled sinusoidal. Singleresistancecontroiledvoltage controlled oscillator using current conveyors and grounded capacitors sheniuan liu hdrxrng ierm. Singlecapacitorcontrolled oscillators using a single cfoa. A novel single resistance controlled sinusoidal oscillator using one p four terminal floating nullor pftfn and one operational transconductance amplifier ota to alongside two resistors and two capacitors, all ground, is presented.
Singleresistancecontrolled quadrature oscillator using. On the design of voltagecontrolled sinusoidal oscillators using otas. Tanjareon,currentmode sinusoidal quadrature oscillator with independent control of oscillation frequency and condition using cdtas, indian journal of pure and applied physics, vol. The colpitts oscillator in figure 2 produces a pure sinusoidal output. Integrable electronically tunable current conveyors. New double current controlled cfa dcccfa based voltage. A singleresistancecontrolled quadrature oscillator circuit using current differencing buffered amplifiers cdbas as active components is proposed. How ever, that circuit still lacked an independent control for adjusting the oscillation condition. The proposed configuration offers the following advantageous features 1 independent control of condition of oscillation and frequency of oscillation 2. Singleresistancecontrolled sinusoidal oscillator using two ftfns.
A novel operational transresistance amplifier otrabased single resistance controlled sinusoidal oscillator srco is proposed. A new single resistance controlled src sinusoidal oscillator using single voltage differencingdifferential input buffered amplifier diba, only four passive vd components two capacitors and two resistors, is presented. Single capacitor controlled oscillators using a single cfoa dharmesh kumar srivastava1 and v. It uses single otra, three resistors and two capacitors.
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