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2 edition of P.S.K. regeneration using a subharmonic oscillator found in the catalog.

P.S.K. regeneration using a subharmonic oscillator

John Hobdell

P.S.K. regeneration using a subharmonic oscillator

a study of the transient properties and demonstration of practicalfeasibility of direct regeneration of phase-shift-keyed signals, using a parametric subharmonic oscillator as a sampling switch.

by John Hobdell

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  • 5 Currently reading

Published by The author in Bradford .
Written in English

Edition Notes

Ph.D. thesis.

The Physical Object
Number of Pages87
ID Numbers
Open LibraryOL20236358M

is subharmonic for every α > observation plays a role in the theory of Hardy spaces, especially for the study of H p when 0 p a subharmonic function on a domain that is constant in the imaginary direction is convex in the real direction and vice versa.

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P.S.K. regeneration using a subharmonic oscillator by John Hobdell Download PDF EPUB FB2

Regeneration Using a Subharmonic Oscillator. Author: Hobdell, J. Awarding Body: University of Bradford Current Institution: University of Bradford Date of Award: Availability of Full Text.

Subharmonic Orbits of a Strongly Nonlinear Oscillator Forced by Closely Spaced Harmonics We study asymptotically the family of subharmonic responses of an essentially nonlinear oscillator forced by two closely spaced harmonics.

By expressing the original oscillator in action-angle form, we reduce it to a dynamical system with three frequencies.

s during a time t s. From the individual quadratures the total output power after amplication can be calculated as P out I2 Q2. We directly probe the rst resonator mode in a reection measurement.

Higher modes can be measured only indirectly due to the 48-GHz bandwidth limitation of our setup. To detect the second mode we use Cited by:   The inductance of the shunt loop in a resistively shunted Josephson tunnel junction may cause relaxation oscillations at subharmonics of the Josephson frequency.

The relaxation period, the injection locking to a subharmonic of a strong external signal, Cited by: Furthermore, subharmonic clock recovery from a Gbs optical time-division-multiplexed data stream is achieved using the same configuration.

Read more Interested in research on Oscillators. k 2 Ai 21ikA iAs, ~1. dAis dz 5i k 2 AsiA2, ~2. where kis the scaled nonlinear coefcient.

At or below threshold, Ai and As are negligible and the nonresonant harmonic eld grows linearly along the me-dium, A2(z)5ikA1(0)2z2, since in a high-nesse cavity (S1T!1) the amplitude of the resonant subharmonic wave is nearly constant. sub-harmonic frequencies. The highest of the sub-harmonic frequencies is found at 12Hz.

However, due to the three phase fault, the sub-harmonic contribution is seen in all three phases. We can see that the resistance of the system is not enough to damp out the sub-harmonics, and severe voltage growing oscillations are observed.

The label subharmonic or subharmonics does not refer to a type of register or specific vocal technique; rather, it is the result of the vocal technique. In this video you will hear and see subharmonics as demonstrated by Logic Pros Test Oscillator plug-in. Notes are set as A0 at 55Hz, A1 at Hz, and E2 at Hz.

(Caution: I.   PDF | In this paper, the subharmonic resonance of Duffing oscillator with fractional-order derivative is investigated using the averaging method. First, | Find, read and cite all the research.

Period-3 subharmonic responses are obtained for an oscillator with power-law nonlinear stiffness. The paper shows that for this type of oscillator, two qualitatively different period-3 subharmonic response branches can be obtained across a broad frequency range.

Bifurcation diagrams of subharmonic motions of order n2. The simplest diagram in the neighbourhood of points a1, a2, a3 of line a (ρ) in Fig. 3, Fig. 4 is shown in Fig. less motion z01 exists with increasing frequency η up to grazing boundary g 0 (point a1), where z11 motion continuously arises and is stable up to its period doubling PD 11 (point a2).

Ph. defense - 050111 S. Winkler SUBHARMONIC OPERATION Local oscillator (LO) frequency requirements lower Transistors only need to P.S.K. regeneration using a subharmonic oscillator book gain up to LO frequency millimeter- wave Easy separation of RF, LO, and IF SELF-OSCILLATINGMIXINGBasics Subharmonic operation realized with a Balanced circuit structure Slide 1266   The subharmonic (period-η, η1) motions of a piecewise-nonlinear (PN) mechanical oscillator having parametric and external excitations are system is formed by a viscously damped, single-degree-of-freedom oscillator subjected to a periodically time-varying, PN stiffness defined by a clearance surrounded by continuous forms of nonlinearity.

We demonstrate that multiple coexisting frequency-conversion processes can occur in an externally resonant second-harmonic generator under suitable conditions. Besides the generation of signal and idler waves by subharmonic-pumped parametric oscillation, sum-frequency mixing among the resonant subharmonic (nm), signal, and idler waves was observed, leading to additional emission.

Regeneration is a novel by Pat Barker that was first published in Summary Read our full plot summary and analysis of Regeneration, scene by scene break-downs, and more. use of a separate oscillator, which separates the oscillator and its frequency from the rest of the receiver, and also allows the regenerative detector to be set for maximum gain and selectivity - which is always in the non-oscillating condition.

[2] A separate oscillator, sometimes called a BFO (Beat Frequency Oscillator) was. Subharmonic Melnikov function of this kind of nonsmooth systems is studied.

Differences of subharmonic Melnikov function between the nonsmooth system with multiple jump discontinuities and the smooth system are analyzed by using the Hamiltonian function and piecewise integral method. The effect of fluctuations on the nonlinear response of an underdamped oscillator to an external periodic field at a subharmonic frequency has been investigated theoretically, numerically, and with an analog electronic circuit model.

The system studied has often been analyzed in nonlinear optics in the context of two-photon absorption and second-harmonic generation. An analysis is given for the second-subharmonic parametric oscillator with two ferromagnetic cores. "Square-loop" reasoning is employed with extreme idealization of the magnetic core properties; the effects of hysteresis losses and saturated inductance are subsequently considered.

The steady-state operation, both with voltage and with current pump drives, is studied to determine the values of. H(s) K (s s 1)(s s 2)(s s 3) a 1 s s 1 a 2 s s 2 a 3 s s 3 The total response of the system can be partitioned into the natural response and the forced response s 0(t) f 1(a 1es1t a 2es2t a 3es3t) f 2(s i(t)) where f 2(s i(t)) is the forced response whereas the rst term f 1() is the natural response of the system, even in the.

Oscillator Circuits and Applications _____ Introduction Oscillator contains circuit that generates an output signal without necessity of an input signal. It is a circuit that produces a repetitive waveform on its output with only dc supply as input.

The oscillator can be sinusoidal or non-sinusoidal type. Justify the use of a simple harmonic oscillator potential, V (x) kx22, for a particle conned to any smooth potential well. Write the time{independent Schrodinger equation for a system described as a simple harmonic oscillator.

Thesketches maybemostillustrative. Youhavealreadywritten thetime{independentSchrodinger. The fundamental and subharmonic resonances of a discrete oscillator with cubic stiffness nonlinearities and linear viscous damping are examined using a multiple-scales averaging analysis.

The system is in a '' internal resonance, i. it has two equal linearized eigenfrequencies, and. The subharmonicpumped oscillator employs a miniature monolithic MgO:LiNbO 3 resonator and is pumped by a singlefrequency Nd:YAG laser at nm.

The threshold power was mW at nm, and an efficiency of 7 for the conversion from to nm via the nonresonant nm wave was reached at mW infrared input power. Single. as shown in Fig This is why the harmonic oscillator is so important in physics. parabola V(x) Figure 2 We will nd below in Eqs.

(7) and (11) that the (angular) frequency of the motion in a Hookes-law potential is. p km. So for a general potential V(x), the k V00(x0) equivalence implies that the frequency is.

r V00(x0) m: (3) 1. our approach makes use of recursive relations to perform the multiple integration of the path integral. ByvirtueofFeynman[1],thequantumpropagator,K(x,x),fortheSHOinonedimension from the position x at time t i to the position x at time t f is given as K(x,x) D[x(t)]exp i t f t i L(x˙,x)dt, (1) where L(x˙,x) 1 2 mx˙2 1 2 ω2x2 (2) is.

Generally, various types of ultra-subharmonic motions can be observed in numerical simulations of periodically forced, non-linear oscillators.

However, theoretical expositions have been provided only for lower-order subharmonics and superharmonics. For a general class of non-linear oscillators, ultra-subharmonic resonances of order 32 and 23 are analyzed by applying the higher-order.

p kK K kK (1) Figure 7 shows the piecewise-linear spring restoring force characteristics for the standard condition shown in table 1. The stiffness ratio is set tobecause 2 is the boundary for the occurrence of subharmonic vibration in actual automobile [1].

-3 -2 -1 0 1 2 0 5 10 kKK p Restoring force (N) Displacement x (mm) kK. The classical equation of motion for a one-dimensional simple harmonic oscillator with a particle of mass m attached to a spring having spring constant k is md2x dt2 kx.

The solution is x x0sin(ωt δ), ω k m, and the momentum p mv has time dependence p mx0ωcos(ωt δ). The total energy (1 2m)(p2 m2ω2x2) E. THE HARMONIC OSCILLATOR Nearly any system near equilibrium can be approximated as a H. One of a handful of problems that can be solved exactly in quantum mechanics examples m 1 m 2 B (magnetic field) A diatomic molecule µ (spin magnetic moment) E (electric field) Classical H.

m X 0 k X Hookes Law: f k X X (0) kx. Nonlinear Dyn () K x x K f(x) c α Fig. 1 Nearly pre-loaded non-linearity with α between and formulation to a more general problem. In a recent paper, Duan and Singh [6] studied the α case.

Further, super-harmonic resonances have been exam. The math is a little tricky. Ray Ridley did a lot of work on this back in the early days of current mode control, but essentially a current-mode controller operating in continuous mode with duty cycle at or above 50 is not unconditionally stable, and a pertubation (change) in the load will cause the converter to break into a periodic instability that is self-sustaining - you see this as.

K R mY. Zp K A pZ Y2 22Y2 Z4 Z4 (8) Table 1 lists the parameters of the model, their units, and the values that produce oscillatory behavior. PARAMETER VALUE UNITS vo µ1 Ms k 10 1s kf 1 1s v1 µMs V 65 µMs V M3 µMs K 2 1 µΜ K R 2 µΜ K A µΜ m   Subharmonic resonances of the parametrically driven pendulum To cite this article: Eugene I Butikov J.

Phys. A: Math. Gen. 35 View the article online for updates and enhancements. Related content An improved criterion for Kapitza's pendulum stability Eugene I Butikov-Extraordinary oscillations of an ordinary forced pendulum Eugene I. We study asymptotically the family of subharmonic responses of an essentially nonlinear oscillator forced by two closely spaced harmonics.

By expressing the original oscillator in action-angle form, we reduce it to a dynamical system with three frequencies (two fast and one slow), which is amenable to a singular perturbation analysis.

The results indicate that such a system has several subharmonic resonant frequencies and that while the friction reduces the peak response of the system when it is excited at its fixed-base natural frequency, ω n, the sliding can induce considerably higher levels of response, when compared with those of a non-sliding, fixed-base system.

We study asymptotically the family of subharmonic responses of an essentially nonlinear oscillator forced by two closely spaced harmonics. By expressing the original oscillator in action-angle form, we reduce it to a dynamical system with three frequencies (two fast and one slow), which is amenable to a singular perturbation analysis.

On 226 at AM, Doctor X said: Fundamental frequency is the lowest partial in signal analysis, and the harmonics of the fundamental are multiple integrals of that.

But I've heard of 'subharmonics' where people are claiming that you can have integral fractions of the fundamental frequency in music. don't understand this, as I thought. Subsynchronous, Subharmonic and the Difference between Them I've had a few discussions over the years about this point and it seems that different people consider them differently.

What isnbsp;subsynchronous and subharmonic in your book. Assume you have a running induction motor at rpm and X is the motor running speed. (32 X) B. ( X) C. (1X) D. A dual-band subharmonic mixer is demonstrated that is capable of down-converting RF signals in two different bands using second and third harmonic components of the local oscillator (LO) signal.

As the mixer requires only one LO, a simple and cost-effective structure is achieved. The drain bias (V DS) is switched to maximize the gain in each RF. Periodic response of a sliding oscillator system to harmonic excitation. B. Westermo. The results indicate that such a system has several subharmonic resonant frequencies and that while the friction reduces the peak response of the system when it S.

P. Shah, Sinusoidal Forced Vibration of Sliding Masonry System, Journal of.The equation used for this Excel plot was exp( t) cos (2p t - ), where the time step was D t = s (corresponding to the samples/s data-collection rate of the PAR1CH). Of the parameters indicated in this expression, both the and the were obtained directly from FFT computations using the Dataq waveform.

Abstract. The polarization state of the input pulses to a segment of microstructured fiber controls the harmonic generation yielding specific frequencies depending on of the input state.