Download Phase Noise and Frequency Stability in Oscillators by Enrico Rubiola PDF

By Enrico Rubiola

Offering a entire account of oscillator part noise and frequency balance, this functional textual content is either mathematically rigorous and obtainable. An in-depth therapy of the noise mechanism is given, describing the oscillator as a actual procedure, and exhibiting that straightforward normal legislation govern the steadiness of a giant number of oscillators differing in expertise and frequency diversity. necessarily, detailed recognition is given to amplifiers, resonators, hold up strains, suggestions, and flicker (1/f) noise. The opposite engineering of oscillators in accordance with phase-noise spectra is additionally coated, and end-of-chapter routines are given. Uniquely, various functional examples are provided, together with case experiences taken from laboratory prototypes and advertisement oscillators, which enable the oscillator inner layout to be understood through studying its phase-noise spectrum. in response to tutorials given through the writer on the Jet Propulsion Laboratory, foreign IEEE conferences, and in undefined, it is a worthy reference for tutorial researchers, practitioners, and graduate scholars in RF engineering and communications engineering.

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Example text

The control is effective for a bandwidth that can be of order 10-200 l a z . In the control bandwidth, the residual phase noise is chiefly due to the phase detector, including the output preamplifier (not shown). Using a double-balanced mixer as the phase detector, this scheme is effective at microwave frequencies, where the mixer's lif' noise is lower than that of the amplifier. Conversely, improving a HF-VHF amplifier in this way can be more difficult because the l / f noise of amplifiers is already low.

The noise of the termination, referred to the amplifier input, is with associated power spectrum kTo = 4 x W/Hz, that is, - 174 dB m in a 1 Hz bandwidth. 12) into (2. lo), with T, = To, we find that because the attenuator attenuates the noise of the termination, as it does with any signal. The attenuator noise referred to the amplifier input is hence and From this relationship it follows that the amplifier receives a noise ltTo from the resistance Ro it sees at its input when I;. = Te = G. 10).

6) is independent of whether the carriers are electrons or holes or a combination of these. The power spectrum of the random current i (t) flowing into a resistor R is Si (v) = 2qT R (W/Hz) . 7) Flicker noise The existence of excess noise, later called corztact rzoise orflicker noise, was initially recognized by Johnson [57]; and after that it was studied in thin films [4, 51 and carbon microphones [19]. 2), is present in an wide variety of physical phenomena, such as stellar emissions, lake turbulences, Nile flooding, and of course virtually all electronic devices.

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