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However, chopping creates a ripple at the output of the amplifier, which is due to the upmodulated amplifier offset and flicker noise.
Gain saturation is strong in any efficient amplifier and we show how it can be exploited to raise instability thresholds be a factor of two or more while staying below the stimulated Brillouin threshold.
Unlike solidly grounded systems, resistance- grounded systems are able to operate continuously with one unintentional ground.
Following this systematic design procedure we can improve the amplifier performance significantly.
The amplifier was found to be quite tolerant of reasonable circuit variations.
Another possibility is the use of a tapered amplifier, which is stabilized by a fiber bragg grating on the backside of the amplifier.
Coupled with adaption algorithms, the receiver can compensate for slow variations in power amplifier characteristics, where adjacent channel interference is created by power amplifier nonlinearities.
Furthermore, simulations tools can also be used to improve the tolerance of the fiber amplifier by helping identifying the best amplifier configuration for operation in the radiative environment.
Measurements demonstrate that the proposed amplifier achieves 45% noise power reduction in the amplification phase along with improved linearity and lower power consumption, when compared with the conventional amplifier.
Tuning of this amplifier is extremely simple.
This paper describes a broad-band parametric amplifier potentially suitable, for example, as the front amplifier in the ground station receiver of advanced satellite communication systems.
The analysis results in useful design guidelines to achieve optimum performance for small variations in amplifier parameters and graceful degradation under the condition of amplifier failure.
The hard breakdown has more serious impact on the operational amplifier.
The new amplifier shows sufficient favorable characteristics.
The amplifier has improved efficiency compared to the conventional distributed amplifier and has improved input and output match compared to the dual-fed distributed amplifier.
It is shown that this amplifier has severe limitations as a low-noise amplifier.
Proceedings ArticleDOI
K. Mori, T. Itoh 
01 Oct 2008
36 Citations
We propose a distributed amplifier integrated with a CRLH leaky wave antenna.
The proposed circuit uses grounded-virtually grounded passive components (which makes the circuit ideal for integration and tuning).
We report a simple and robust Ti:sapphire regenerative amplifier without prepulse stretching.
Thanks to the folded cascode stage and to the symmetrical output buffer, the amplifier exhibits both intrinsic robustness to interferences and good amplifier performances.

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