The working principle of microphone transformer is mainly based on the principle of magnetic flux transformation. It uses a pair of coils made of magnetic materials to realize voltage conversion, one of which is called "input coil" and connected to the microphone; The other coil, called "output coil", is connected to the receiving device. When the signal is transmitted through the microphone input coil, it will generate a magnetic field and an electromotive force on the output coil, thus achieving the purpose of voltage conversion.
In this kind of transformer, two commonly used technologies are used to improve the voltage: transformer winding transformer technology (voltage conversion rate is equal to the ratio of coil turns) and inductive coupling transformer (inductors are coupled with each other to improve the voltage).
Generally speaking, microphone transformer can greatly improve the signal transmission quality, reduce noise interference and better prevent electromagnetic interference.
The microphone transformer in use has other important characteristics.
First of all, it has high impedance conversion ability. Because the output signal of microphone is often low voltage and high current, and the output coil usually needs high voltage and low current signal. Microphone transformer can effectively realize this conversion.
Secondly, it has a very high signal-to-noise ratio. Microphone transformer can effectively eliminate noise interference, thus improving signal transmission quality.
Thirdly, the microphone transformer has high electromagnetic compatibility (EMC). Because the microphone transformer can effectively eliminate electromagnetic interference and will not affect the surrounding electronic equipment.
Microphone transformers are often used in audio recording, radio stations and other audio applications, and play an important role.
In addition to the above applications, microphone transformers have many other applications.
In telephone system, microphone transformer is used to convert microphone signals into signals that meet the requirements of telephone lines, and can effectively prevent noise interference.
In the stage sound equipment, microphone transformer is used to convert the microphone signal of the singer or speaker into a signal that meets the requirements of the sound system, and can effectively eliminate noise interference.
In medical equipment, microphone transformer is used to convert the microphone signals of doctors or nurses into signals that meet the requirements of medical equipment, thus improving the accuracy of diagnosis.
In a word, the microphone transformer is an important signal converter, which can effectively convert the low-voltage and high-current signals output by the microphone into signals that meet the requirements of other equipment.