Magnetic Recording on Tape - Block Diagram | New Topic

In this note, we are going to learn about The Block Diagram of Magnetic Recording on Tape. Welcome to Diploma to Degree, an ultimate solution for diploma and degree engineering notes.

Author Name: Arun Paul.    

What is Magnetic Tape Recording?

Magnetic tape recording is a way of storing music, video, or data by magnetizing a thin plastic strip coated with a ferromagnetic material, such as iron oxide. It was widely utilized for analog audio recording, video recording, and early digital data storage.

Magnetic Recording on Tape - Block Diagram

Here is the magnetic tape recorder diagram of production and reproduction –

A. Magnetic Tape Recording - Production

A microphone converts changes in sound pressure into electrical fluctuations (audio signals). The microphone's audio output is amplified and fed into the coil of an electromagnet. The electromagnet (named the 'Head') contains a small gap through which magnetic lines of force cannot easily flow due to the high resistance of air. When a tape coated with a magnetic material (such as iron oxide) is used to bridge the gap, the lines of force travel easily through the iron oxide, forming elementary magnets.

The magnetic strength of an electromagnet, and hence the space spanned by the tape's iron oxide, is proportional to its audio current. Thus, the iron oxide layer on the tape is magnetized in response to the audio current and, as a result, to fluctuations in sound pressure. The magnetism of iron oxide can be retained for a long period. This indicates that sound was recorded as fluctuating magnetic fields.

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