6 results about "Phantom power" patented technology

This invention discloses an adjustable frequency response microphone integrating XLR and USB outputs, comprising a microphone body, a dynamic microphone driver, a passive filter, a pass-through / preamp circuit, an XLR XLR interface, a USB module, and a function control circuit. The passive filter employs an LC circuit structure, supporting three frequency modes: low-frequency cutoff, mid-frequency boost, and flat response, effectively filtering out ambient noise and enhancing vocal quality. The pass-through / preamp circuit offers both pass-through and preamp modes, with adjustable preamp gain to accommodate dynamic microphone drivers of varying sensitivities, and can be externally or internally powered by phantom power. The USB module integrates a Type-C interface and an audio chip, supporting analog-to-digital / digital-to-analog conversion, real-time headphone monitoring, and external power supply. The function control circuit integrates an encoder and a touch panel, enabling adjustments such as volume, mixing, and mute, and enhances the interactive experience with an RGB lighting module. This invention combines the advantages of professional XLR output with convenient USB output, making it suitable for professional recording, live streaming, gaming, and other scenarios.

This utility model relates to an analog microphone mute circuit and audio device. The mute circuit includes: first and second connection terminals, a trigger switch unit, a voltage divider unit, an isolation filter unit, and two MOS switch units; the first and second connection terminals are respectively connected to the positive terminal of the audio output and the phantom power input, and the negative terminal of the audio output and the phantom power input; the trigger switch unit is turned on or off according to a mute trigger signal; the voltage divider unit generates a first voltage divider or a second voltage divider according to the on or off state of the trigger switch unit; one MOS switch unit is connected to the first connection terminal and the first terminal of the isolation filter unit; the other MOS switch unit is connected to the second connection terminal and the second terminal of the isolation filter unit; the control terminals of both MOS switch units are connected to the output terminal of the voltage divider unit, and are fully turned on when receiving the first voltage divider and slightly turned on when receiving the second voltage divider. Implementing this utility model can improve the isolation between the analog microphone input and output, and improve the user experience.

The application discloses a kind of analog microphone open microphone detection device, including analog microphone interface, signal amplification module, rectifier module and phantom power module, the first end of analog microphone interface is connected phantom analog microphone, the second end of analog microphone interface is connected with the input end of signal amplification module, the output end of signal amplification module is connected with the input end of rectifier module, signal amplification module is amplified for phantom analog microphone microvoltage signal generated in response to environmental noise, the output end of rectifier module is connected with the host chip of digital conference host, rectifier module is rectified for the electric signal output by signal amplification module, the input end of phantom power module is connected with digital conference host, the output end of phantom power module is connected with the second end of analog microphone interface, whether phantom analog microphone can be detected open microphone, phantom analog microphone is managed on-line is realized.

The utility model discloses a modularized audio frequency distributor which comprises a plurality of fixed audio frequency distribution isolation modules with independent channels and a plurality of optional function modules, the fixed audio frequency distribution isolation modules are arranged in a main shell, and the function modules comprise phantom power supply modules, audio frequency signal level indication modules and extended audio frequency distribution isolation modules. The main shell is provided with a modular slot, and any one or more functional modules are connected with the modular slot in a pluggable mode. According to the utility model, through the center tap design of the four-winding isolation transformer, input / output signal physical isolation is realized, common-ground current noise interference is eliminated, and the modular slot supports plug and play of functional modules such as phantom power supply, level indication and channel expansion. The problems of common-ground switching noise of traditional equipment and damage of a phantom power supply to an isolation structure are solved, flexible function configuration is realized through a hot plug design, system wiring complexity is reduced, and audio signal transmission quality and equipment maintenance efficiency are improved.

A voice transmission system includes an input circuit receiving a signal from a differential output microphone, and including: an operational amplifier having an input side connected to a first output terminal and a second output terminal of the differential output microphone, and an output side connected to an analog / digital converter outputting, to a slave circuit connected to a master circuit, a voice signal obtained by analog / digital conversion of a signal output from the input circuit; a power supply connected to the input side and performing phantom power supply; and an output section connected between the input side and a slave circuit, outputting a first output voltage to the slave circuit when the differential output microphone is connected to the input circuit, and outputting a second output voltage different from the first output voltage to the slave circuit when the differential output microphone is not connected to the input circuit.

The utility model provides a phantom microphone insertion detection circuit which realizes a phantom microphone insertion detection function. The microphone comprises a power supply module and a microphone connector. The power supply module comprises a first power supply resistor and a second power supply resistor, one end of the first power supply resistor is connected with the phantom power supply, the other end is connected with one end of the second power supply resistor, and the other end of the second power supply resistor is connected with the microphone connector; the system further comprises a detection module. The detection module comprises a first detection resistor, a second detection resistor and a detection point; one end of the first detection resistor is connected to the joint of the first power supply resistor and the second power supply resistor, the other end is connected with one end of the second detection resistor, and the other end of the second detection resistor is grounded; the detection point is connected in parallel with the second detection resistor.