8 results about "Integrated amplifier" patented technology

The invention discloses a single-feedback closed-loop proportional throttle valve of an integrated amplifier, and relates to the technical field of throttle valve production. An integrated amplifier single-feedback closed-loop proportional throttle valve comprises a main valve, a pilot proportional valve, a displacement sensor and an amplifier, and single-feedback closed-loop control over displacement of a main valve element is formed through a built-in oil way and electric signal feedback. On the basis that a main valve and a pilot proportional valve adopt a threaded plug-in integrated design, an integrated amplifier and a displacement sensor are taken as cores, a single-feedback closed-loop control loop is constructed, a slide valve structure of the pilot proportional valve is matched with precise electromagnetic control, the movement flexibility and clamping stagnation resistance of a valve element are remarkably improved, and the service life of the pilot proportional valve is prolonged. The technical problems that a traditional double-feedback proportional throttle valve is complex in structure and prone to clamping stagnation are effectively solved, accurate proportional throttle control under the high-pressure large-flow working condition is achieved, and the double-feedback proportional throttle valve has the remarkable advantages of being compact in structure, fast in response, high in anti-pollution capacity and high in reliability.

The application discloses an integrated-amplifier single-feedback closed-loop proportional throttle valve and relates to the technical field of throttle valve production.The integrated-amplifier single-feedback closed-loop proportional throttle valve comprises a main valve, a pilot proportional valve, a displacement sensor and an amplifier, and a single-feedback closed-loop control of the displacement of a main valve core is formed through built-in oil paths and electrical signal feedback.Based on the integrated design of the threaded plug-in type of the main valve and the pilot proportional valve, the integrated amplifier and the displacement sensor are taken as cores to construct a single-feedback closed-loop control loop, the slide valve structure of the pilot proportional valve is matched with accurate electromagnetic control, the flexibility and the anti-sticking ability of the valve core movement are obviously improved, the technical difficulties of the complex structure and the easy sticking of the traditional double-feedback proportional throttle valve are effectively solved, accurate proportional throttle control under the high-pressure large-flow working condition is realized, and the integrated-amplifier single-feedback closed-loop proportional throttle valve has the obvious advantages of compact structure, fast response, strong anti-pollution ability and high reliability.

An audio power amplifier circuit and a duty cycle modulation circuit and a noise suppression circuit thereof are disclosed. The audio power amplification circuit includes an integral amplifier module and a high frequency switch The duty cycle modulation circuit is used to adjusts a gain of the audio power amplifier circuit by controlling a duty cycle of the high frequency switch. The duty cycle modulation circuit counts pulses of a duty cycle modulation signal to obtain a first count value counts pulses of a clock signal to obtain a second counting value and performs a logical operation according to the first count value, the second count value, and the clock signal to obtain a switch modulation signal for controlling the high frequency switch. The “pop” noise is weakened by controlling the gain of the audio power amplifier circuit, and the cost is reduced while meeting the high linearity of the circuit.

The application provides a super multi-channel PMUT array element two-dimensional arrangement structure and a transducer. The super multi-channel PMUT array element two-dimensional arrangement structure comprises PMUT array elements, integrated amplifiers, a PCB board, a flexible flat cable, a flat cable plug, a backing and a shell. The shell has a bottom plate. The PMUT array elements are uniformly arranged on the PCB board. The PMUT array elements have output wires, and the output wires are connected with electrodes of the PCB board. The back of the PCB board is provided with integrated amplifiers. Each PMUT array element corresponds to an integrated amplifier. The output signals of the integrated amplifiers are connected to the flexible flat cable. The end of the flexible flat cable is connected to the flat cable plug. The flat cable plug passes through the bottom plate and extends to the outside of the bottom plate. The application designs the flexible flat cable and the flat cable plug. Since the signals of multiple array elements are concentrated in the two-dimensional arrangement structure, the connection points of the two-dimensional arrangement structure and external back-end circuits are greatly reduced, the docking difficulty is greatly reduced, and the signal lead-out line problem of multi-channel receiving array elements is solved.

The application discloses an integrated amplifier circuit, which comprises an input signal conditioning module, a front-stage signal amplification module, an intermediate signal amplification module and a power output module connected in sequence. The input conditioning module is isolated from direct current through double-coupling capacitors, and impedance matching and current-voltage conversion are completed through resistors, so that direct current interference and input waveform distortion are eliminated. The front stage adopts a double-NPN triode amplification structure matched with a diode voltage-stabilized bias to realize primary amplification of weak pulse signals. The intermediate stage completes secondary signal amplification through combined triodes and relies on a compensation capacitor to suppress self-oscillation. The power output module adopts a double-NPN triode push-pull structure to improve signal driving capacity and simultaneously has overload protection and direct current isolation output functions. The circuit has the advantages of simple structure, strong anti-interference performance, excellent amplification precision and driving performance, and can effectively improve the problems of distortion and easy self-excitation of traditional circuits, and is suitable for weak pulse signal amplification scenes.

1. The name of the design product: music streaming integrated amplifier. 2. The use of the design product: the design product is used for streaming playback / local music playback / decoding DAC / analog pre-stage / power amplifier, etc. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The application relates to the technical field of proportional speed regulating valves, and discloses an integrated LVDT and high-protection proportional speed regulating valve, which comprises a valve body and an integrated amplifier arranged on the valve body, the top of the valve body is fixedly connected with an LVDT displacement sensor, further comprises a throttling part arranged in the valve body and used for controlling flow, an anti-backflow part installed in the valve body and used for preventing backflow, and a pressure regulating part located in the valve body and used for balancing pressure, wherein the integrated amplifier controls the throttling part to run, so that liquid enters the valve body and then flows out through the anti-backflow part. The throttling part is arranged, so that the problem that the existing integrated LVDT and high-protection proportional speed regulating valve is inconvenient to regulate and control the connected channel during use, the channel is difficult to be rapidly cut off or connected, the flow is difficult to be self-adaptively regulated, the flow fluctuation is too large, and the overloading condition is prone to occur, thereby reducing the service life of the speed regulating valve is solved.

An integrated acoustic emission detection device comprises a hollow sphere, and a plurality of embedding grooves are distributed in the surface of the hollow sphere; a plurality of acoustic emission sensors are arranged on the inner wall of the hollow sphere, and a conduction plate is arranged in each embedding groove; the embedding grooves are used for separating the adjacent conduction plates, and the conduction plates are used for transmitting sound waves to the corresponding sound emission sensors; the integrated amplifier is arranged in the hollow sphere, the input end of the integrated amplifier is connected with the acoustic emission sensor, the output end of the integrated amplifier is connected with the cable, and one end of the cable is connected with detection equipment outside the hollow sphere. A scaffold does not need to be erected in the detection process, so that an interference source generated by friction between the scaffold and the wall of the container is avoided during signal acquisition, and detection personnel can judge the property of the acoustic emission source more conveniently.