Theory of subharmonic synchronization of nonlinear oscillators

Daryoush, A.S.; Berceli, T.; Saedi, R.; Herczfeld, P.R.; Rosén, Anders

doi:10.1109/mwsym.1989.38829

Cited by 33 publications

(13 citation statements)

References 8 publications

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“…To compute this locking range, we again apply the Barkhausen criterion, just as in analyzing the free-running oscillator. As before, we can express as a polynomial series, this time of the form (5) Let and . In this case, the products of are given by [3] products (6) If, for some integers and , , then the corresponding output terms in (6) will exist at the frequency of oscillation .…”

Section: Injection-locked Oscillator: Model 1 (Adler)mentioning

confidence: 99%

A unified model for injection-locked frequency dividers

Verma¹,

Rategh²,

Lee³

2003

IEEE J. Solid-State Circuits

210

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Section: Injection-locked Oscillator: Model 1 (Adler)mentioning

confidence: 99%

A unified model for injection-locked frequency dividers

Verma¹,

Rategh²,

Lee³

2003

IEEE J. Solid-State Circuits

210

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“…Daryoush et al 15 and Thang et al16have already demonstrated this idea for indirect injection locking. The synthesizer's frequency was suecessively set to the second, third and fifth subharmonics of the microwave oscillator and a new set of locking ranges was measured for each subbarmonic at different values of P. Figure 10 shows a plot of tbe locking range as a function of P measured at the fundamental harmonic and at the second, third and fifth subbarmonics of the microwave oscillator.…”

Section: Fet Exposure To Modulated Light Intensitymentioning

confidence: 89%

Stability measurements of an optically injection-locked microwave oscillator

et al. 1993

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Experimental results on the direct injection-locking of a microwave oscillator by an intensity modulated opiical si are presented. Starting with a free-running oscillator, RF specfrum measliements are done as we vary the modulation frequency of the optical signal impinging on t1 oscillator. The locking range (as much as 5 MHz) is measured for different modulating signal power levels on tl laser diode at the fimdamental frequency and at d 2nd, 3rd and 5th subbarmonics. Frequeiy stability measurements are conducted in both time domain (Allan variance) and frequency domain (power spectral density). It shows that tla phase noise and the long term stabiliy of the microwave oscilht are greatly improved under locked conditionS The Allan standard deviation of the microwave oscillator at i = 0.1 s improves from 10-6 t 1& reaching the precision limit of the nieasurement setup.

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“…The frequency of the external signal must be within the operating frequency range of the oscillator at the fundamental or a subharmonic of the required output frequency [subharmonic injection-locked oscillator (ILO)] [4], [5]. Furthermore, self-oscillating mixers (SOMs) simultaneously implement both the oscillation and mixing functions [6]- [8].…”

Section: Introductionmentioning

confidence: 99%

“…Here, we propose a novel multifunctional circuit operating at 5 GHz, which provides injection-locked oscillation, self-oscillating mixing, and injectionlocked self oscillating mixing with high up-conversion gain and reduced carrier-to-noise ratio. Furthermore, it functions as a free-running oscillator and as a frequency multiplier ( 2,4) and amplifier. Finally, the theoretical analysis of the proposed circuit is presented.…”

Section: Introductionmentioning

confidence: 99%

A 5-GHz Subharmonic Injection-Locked Oscillator and Self-Oscillating Mixer

Plessas

Papalambrou²,

Kalivas³

2008

IEEE Trans. Circuits Syst. II

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This paper presents a multifunctional circuit realizing the functions of oscillation, mixing, amplification, and frequency multiplication at 5 GHz. A theoretical and experimental description of the circuit is given. The proposed circuit, which combines both the injection-locking and mixing processes, uses only one port where both the RF/intermediate frequency signal and the injection signal (IS) are applied. The IS, which is used to stabilize the oscillation, is at a subharmonic of the oscillation frequency ( osc 4) having a power level as low as 50 dBm. Calculations of the phase noise and measurements of the mixing properties are reported which indicate a noise improvement, and a high up-conversion gain. The implementation of the circuit exhibits an up-conversion gain of 14 dB, a phase noise of 110 dBc/Hz at 100-kHz offset, a P 1 dB of 15 dBm, a third-order intercept point of 2 dBm, and a power consumption of 35 mW. Calculated and measured results are in good agreement for all cases, emphasizing the relevance of the proposed circuit. Index Terms-Injection-locked oscillator (ILO), phase noise, self-oscillating mixer (SOM).

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Theory of subharmonic synchronization of nonlinear oscillators

Cited by 33 publications

References 8 publications

A unified model for injection-locked frequency dividers

A unified model for injection-locked frequency dividers

Stability measurements of an optically injection-locked microwave oscillator

A 5-GHz Subharmonic Injection-Locked Oscillator and Self-Oscillating Mixer

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