47 results about "Hybrid amplifier" patented technology

A radiometer system includes a dual channel, quadrature hybrid amplifier circuit that receives an antenna signal and a known reference signal to equalize gain in two parallel gain stages. A detector circuit receives a signal from the quadrature hybrid amplifier circuit and detects the signals to form a detected output for eliminating sensitivity to gain variations, improving dynamic range of the input signal, and reducing calibration requirements. A log ratio amplifier receives and linearizes the detected output. An integrator circuit receives a signal from the log ratio amplifier and sums the signal over an observation.

The invention provides a public television karaoke systems including MIC signal mixed with the microphone signal mixer, the mixer and microphone signals connect the microphone volume control signal controller, connected with the microphone volume controller handling the reverberation circuit, audio mixing amplifiers, sequential mixed audio amplifier connected television volume audio power amplifier controller and TV, as well as through the A / D converter with the microphone signal mixer connected audio and video processors; including audio and video processor various useful to external hard drives and flash memory USB 2.0 high-speed OTG controller, digital audio output interface, video encoding output interface, receive remote control orders issued by the operation of the various infrared receiver mouth; PC through the USB interface and other USB storage devices for data transmission, television karaoke rich source programs, more convenient and more practical.

A multi-band hybrid amplifier is disclosed for use in optical fiber systems. The amplifier uses Raman laser pumps and semiconductor optical amplifiers in series to produce a relatively level gain across the frequency range of interest. Multiple Raman pumps are multiplexed before coupling into the fiber. The Raman amplified optical signal may be demultiplexed and separately amplified by the SOAs before re-multiplexing. Gain profiles of the Raman pumps and the SOAs are selected to compensate for gain tilt and to alleviate the power penalty due to cross-gain modulation in the SOAs. The disclosed hybrid amplifier is especially useful in coarse wavelength division multiplexing (CWDM) systems.

A discrete hybrid amplifier is disclosed for use in optical fiber systems. The amplifier uses one or more Raman laser pumps together with semiconductor optical amplifiers in series to produce a relatively level gain across the frequency range of interest. The Raman pump utilizes a length of highly non-linear fiber as the gain medium. The disclosed lower-cost hybrid amplifier is especially useful in coarse wavelength division multiplexing (CWDM) systems and in local access portions of the network.

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.

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.

A radio-frequency module comprises a low-noise amplifier including a common source transistor having a gate node that receives a radio-frequency input signal and a drain node that transmits a combined radio-frequency output signal, and a correction signal input path configured to receive a correction signal and provide the correction signal to a source node of the common source transistor to generate, at least in part, the combined radio-frequency output signal.

The invention provides a cascaded Hybrid amplifier control method and system. All the Hybrid amplifiers in the cascaded Hybrid amplifiers start to perform pump turn-on flow simultaneously: when the Hybrid amplifiers receive a pump turn-on request, Raman input optical power stability judgment is performed when the conditions of satisfaction are judged, operation of pump turn-on is performed on an EDFA, and the EDFA enters an APC working mode; operation of pump turn-on is performed the Raman, and gain deviation is calculated according to calculation of input optical power before and after pump turn-on of the Raman when there is no reflecting alarm; Raman gain is adjusted according to the gain deviation, an AGC working mode is switched on after completion of judgment, and the AGC working mode is an automatic gain control working mode; and the working mode of the EDFA is switched to the AGC working mode. The gain of the Raman can be accurately controlled so that control precision is enhanced and performance of the cascaded Hybrid amplifiers can be improved.

The invention discloses a combined antenna capable of being erected on a satellite antenna. The combined antenna comprises a high-frequency antenna element (1), a low-frequency antenna element (2) and a unified hybrid amplifier (3), wherein the low-frequency antenna element (2) is a U-shaped metal bracket of which the two ends are in closed connection with the unified hybrid amplifier (3); the high-frequency antenna element (1) is fixed on the U-shaped metal bracket through a supporting piece (5); the bottom of the high-frequency antenna element (1) is provided with a wire hole (4); and one side of the supporting piece (5) is provided with a fixed piece (6) fixed on the satellite antenna. The combined antenna can be firmly erected on the satellite antenna, has a wide receiving range, covers high frequency, low frequency and ultrahigh frequency and can meet the increasing requirements of people on antenna functions.

A multi-band hybrid amplifier is disclosed for use in optical fiber systems. The amplifier uses Raman laser pumps and semiconductor optical amplifiers in series to produce a relatively level gain across the frequency range of interest. Multiple Raman pumps are multiplexed before coupling into the fiber. The Raman amplified optical signal may be demultiplexed and separately amplified by the SOAs before remultiplexing. Gain profiles of the Raman pumps and the SOAs are selected to compensate for gain tilt and to alleviate the power penalty due to cross-gain modulation in the SOAs. The disclosed hybrid amplifier is especially useful in coarse wavelength division multiplexing (CWDM) systems.

A novel camera locating tracking method for an intelligent automatic sound mixing system mainly includes following steps: (1) controlling audio signals and camera signals separately and designing a microphone channel and a camera channel respectively, wherein the microphone channel and the camera channel are characterized in that microphone/camera keys are arranged at the upper ends of the microphone channel and the camera channel, and a microphone/camera selecting switch is further arranged between the microphone channel and the camera channel; (2) designing a camera signal receiver for receiving camera request signals, enabling the camera signal receiver to be connected with a mixing amplifier and a controller in the intelligent automatic sound mixing system, enabling the controller to provide signals for a camera driver and control position transition of a camera; and (3) connecting the mixing amplifier and an input amplifier in the intelligent automatic sound mixing system, and enabling the audio signals to achieve sound amplification according to the working principle of intelligent automatic sound mixing. A phenomenon that projection images run along with variation of sound amplifying signals caused by providing the driving signals for the camera driver through the sound amplifying signals is changed thoroughly.

The embodiment of the invention discloses a bidirectional Raman erbium-doped fiber hybrid amplifier, an optical signal amplification method and an optical communication system. The optical fiber hybrid amplifier comprises a Raman pump output port, a bidirectional Raman amplifier, a 2 * 2 optical switch, an erbium-doped optical fiber amplifier input connection port, an erbium-doped optical fiber amplifier, an erbium-doped optical fiber amplifier output connection port and a system signal optical port. The Raman pump output port, the bidirectional Raman amplifier, the 2 * 2 optical switch and the system signal optical port are sequentially connected through an optical path, and the erbium-doped optical fiber amplifier is connected with the 2 * 2 optical switch through the erbium-doped optical fiber amplifier input connecting port and the erbium-doped optical fiber amplifier output connecting port. The 2 * 2 optical switch can gate a connection path between the bidirectional Raman amplifier and system signal light port and the output and input connection ports of the erbium-doped fiber amplifier, thereby realizing opposite or same-direction propagation of the pump light and the signallight. According to the embodiment of the invention, the Raman pump output end is stably connected with the optical fiber, repeated plugging is not needed, and single-fiber duplex is supported.