47 results about "Hybrid amplifier" patented technology

An acousto-optic modulator includes an acousto-optic bulk medium. A transducer is attached to the acousto-optic bulk medium and formed as a linear array of electrodes. A transducer driver is connected to each electrode and comprises a plurality of amplifiers connected to the electrodes such that each electrode is driven by a respective amplifier as a means to provide a low cost alternative to the use of higher power hybrid amplifiers in conventional AO device applications.

Methods for optimizing a noise figure of a variable gain hybrid amplifier (HA) which includes a variable gain Raman amplifier with adjustable average gain G R and gain tilt T R and a variable gain lumped amplifier with adjustable average gain G L and gain tilt T L . In various embodiments, the methods include receiving as input a required hybrid amplifier average gain G H value and a required gain tilt T H value and deriving a set of G R , T R , G L and T L values which yield an optimal optimized hybrid amplifier NF and satisfy the conditions G R + G L = G H and that T R + T L is within a specified hybrid amplifier operating tilt range. In some embodiments, the derived T R and T L values satisfy the condition T R + T L = T H . A hybrid amplifier implementing a method disclosed herein includes a modified control unit configured to control both average gain and gain tilt parameters of the Raman amplifier and the lumped amplifier to satisfy the conditions above.

The signal receiver has means to suppress at least one higher harmonic component from a MEMS or crystal oscillator having a reference resonator in filtered intermediate signals of a signal receiver. The signal receiver comprises an antenna for receiving electromagnetic signals, a low noise amplifier for amplifying signals received by the antenna, one MEMS or crystal oscillator comprising a reference resonator to generate an oscillating signal with a predefined duty-cycle, a mixer for mixing the amplified and received signals with the oscillating signal to generate intermediate signals, a band-pass filter to filter the intermediate signals, and a duty-cycle controller coupled to the MEMS or crystal oscillator and coupled to the output of the band-pass filter to analyze the spectrum of the filtered intermediate signals and to modify the duty-cycle of the oscillating signal in response to the spectrum analysis of the filtered intermediate signals.

The present invention provides an apparatus and method for compensating for the variation of a gain spectrum attributable to the temperature variation of a fiber amplifier, and a long-wavelength band dispersion-compensating hybrid amplifier equipped with the gain spectrum compensating apparatus. The apparatus includes a DCF located between a first amplification stage and a second amplification stage to compensate for dispersion of an optical signal output from the first amplification stage and perform Raman amplification of the optical signal using input pumping light; at least one pumping light provision means for providing forward or backward pumping light to the DCF; first and second temperature detection means for detecting temperature variations of the first and second amplification stages, respectively; and control means for controlling intensity of the pumping light of the pumping light provision means according to the detected temperature variations.

The invention provides a control method based on erbium-doped and Raman amplifiers and a hybrid amplifier, the method comprising the following steps: selecting parameters within the parameter selection interval according to a preset parameter selection interval, establishing the parameters as a plurality of parameter groups, parameter Parameters in the group include Raman pump power, Erbium-doped pump power, Raman fiber length, and Erbium-doped fiber length; calculated from Raman pump power, Erbium-doped pump power, Raman fiber length, and Erbium-doped fiber length The total gain, using the genetic algorithm to iteratively update the parameter group, select the parameter group corresponding to the larger total gain in each iterative update; when the last iteration is completed, select the parameter group corresponding to the maximum total gain as the final target parameter. The application combines the Raman fiber amplifier and the erbium-doped fiber amplifier, iterates through the genetic algorithm, outputs the parameter group corresponding to the maximum total gain, and adjusts the Raman fiber amplifier and the erbium-doped fiber amplifier at the same time to improve the amplification effect.

A power amplifier (10) configured to generate impedances at harmonic frequencies such that the power amplifier (10) operates in a class C mode in a low output amplitude range and in a class F or inverse F mode in a high output amplitude range.

The invention discloses a microstructural multi-layer composite distributor, which comprises a microlayer distributor and a hybrid amplifier, wherein the microlayer distributor is formed by overlapping one or more structural plates; the structural plate is provided with a plurality of flow layer communicating ports at intervals; after a plurality of layers of structural plates are overlapped, corresponding flow layer communicating ports of the layers are communicated; a feed melt is injected from runners of the structural plates, is distributed by the flow layer communicating ports of the layers to be superposed, and is transmitted to the hybrid amplifier; the hybrid amplifier is provided with a plurality of flow layer channels which are overlapped in a staggered mode and form a hybrid outlet channel; and the flow layers are multiplied and overlapped at the hybrid outlet to form an integral flow layer. The ideal thickness of the flow layer is achieved through compression, the layer number of the structural plates can be increased so as to achieve the overlapping and multiplication of more layers, and various rays are reflected through interference of the surfaces of the hundreds of flow layers, so that a composite membrane has a rainbow effect.

Methods and hybrid matrix amplifiers are provided. In a method of calibrating a hybrid matrix amplifier of a wireless transceiver, a plurality of signal paths having a digital and an analog portion are toggled such that the analog portion of each of the plurality of signal paths is active only during a corresponding buffer capture interval of a calibration process. The signal paths carry signals to be transmitted by an antenna arrangement. Channel estimates for each of the plurality of signal paths are generated based only on sampling data collected during the corresponding buffer capture interval. The hybrid matrix amplifier is calibrated based on the generated channel estimates.