2results about "Signal processing for reducing noise" patented technology

To provide a magnetic recording device capable of improving recording density.SOLUTION: A magnetic recording device 210 includes a magnetic head 110 and a control unit 75. The magnetic head includes a first magnetic pole 31, a second magnetic pole 32, a magnetic element 20 provided between the first magnetic pole and the second magnetic pole, a first terminal T1 electrically connected to the first magnetic pole, a second terminal T2 electrically connected to the second magnetic pole, and a coil 30c. The control unit is electrically connected to the first terminal, the second terminal, and the coil. One end of the magnetic element is electrically connected to the first magnetic pole. The other end of the magnetic element is electrically connected to the second magnetic pole. The control unit can perform a recording operation. In the recording operation, the control unit supplies a recording current to the coil while applying an element voltage of a first voltage or more and a second voltage or less between the first terminal and the second terminal.SELECTED DRAWING: Figure 1

The invention relates to the technical field of recording pen design, in particular to a recording system and method based on wireless communication and recording equipment, and the system comprises a microphone module which is used for receiving to-be-processed analog audio and converting the to-be-processed analog audio into to-be-processed digital signals; the processor module is used for receiving the to-be-processed digital signal and performing signal processing based on the to-be-processed digital signal so as to generate an audio digital data packet; and the antenna module is used for sending an audio digital data packet and receiving an instruction, and transmitting the audio digital data packet to the man-machine interaction equipment by adopting a preset Bluetooth protocol so as to display the audio in real time. According to the invention, the audio digital data packet which is convenient to store and automatically played can be obtained, so that automatic playing while recording can be realized, and the practicability of the recording equipment is improved.