BD37521FS-E2

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Audio Special Purpose- BD37521FS-E2 Application Field and Working Principle

The BD37521FS-E2 is an audio folder switch IC that integrates envelope detection, level detection, and control logic circuits. It was first developed in 2003 by ROHM, providing a reliable and cost-effective solution for various audio applications. Specifically, BD37521FS-E2 is designed for filing, music production and radio broadcasting applications.

BD37521FS-E2 integrates envelop detection, level detection and control logic circuits, providing a comprehensive power management solution for audio related systems, such as music production systems, radio broadcasting systems and recording systems, where it is required to control the power on/off and audio signal level. Amongst the features of BD37521FS-E2, the envelope detection can monitor the peak level of the input audio signal, the level detection can detect the signal level of the input, and the control logic circuits can control the output power on/off, allowing for the power management of audio equipment that rely on such signal detection and switching.

To be precise, the envelope detection circuit of BD37521FS-E2 monitors the peak level of the input audio signal, and when this peak level reaches the pre-set level, the envelope detection circuit output is held high, and when the signal level drops below the pre-set level, the output is held low, providing an effective switch signal for controlling the power on/off. Also, the signal level detection circuit of BD37521FS-E2 includes two levels: signal threshold detection and signal level detection. The signal threshold detection circuit monitors the signal level of the input signal, and when the level reached the pre-set detection level, the detect signal output is low. Subsequently, the signal level detection circuit monitors the signal level continuously to adjust the output voltage which is reflecting the signal level.

Moreover, the control logic circuit of BD37521FS-E2 allows for variable control speed. The narrow-band control circuit is designed for the radio broadcast application, and the wide-band control circuit is designed for the general audio system application. The control logic circuit provides the power on/off switching control, and allows the user to set the high and low speed for the power on/off control. This is very helpful in managing the power usage of audio equipment that requires the constant monitoring and detection of audio signal level.

In conclusion, BD37521FS-E2 offers a comprehensive power management solution for audio related systems, and provides a reliable and cost-effective solution for various audio applications. Through its integration of envelope detection, level detection, and control logic circuits, BD37521FS-E2 is able to effectively monitor and manage the audio signal level, and control the power on/off of audio equipment. The applications of BD37521FS-E2 include music production, radio broadcasting, and recording systems, and it provides excellent power saving performance in these audio related systems.

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