Preprocessing module used for switching primary and standby audio receivers

Abstract

The invention discloses a preprocessing module used for switching primary and standby audio receivers. The preprocessing module comprises a first resistor, a first operational amplifier, a second operational amplifier, a second diode, a variable resistor, an NE555 time-based integrated circuit, a rectifier and filter circuit, a time delay circuit and a power supply. The first operational amplifier is connected with an inverting amplifier, and a non-inverting input end of the first operational amplifier is earthed. One end of the variable resistor is connected with an inverting input end of the second operational amplifier while the other end is connected with the power supply. A positive pole of the second diode is connected with the output end of the second operational amplifier while a negative pole is connected with the NE555 time-based integrated circuit. The rectifier and filter circuit comprises a first diode and a first electrolytic capacitor, the time delay circuit comprises a fifth resistor and a second electrolytic capacitor, and a third pin of the NE555 time-based integrated circuit is a trigger level signal output end. By using the preprocessing module, a trigger signal is generated to control the standby receiver to put into use, and thus normal transmission of an audio signal can be ensured.

Description

technical field [0001] The invention relates to the technical field of audio processing, in particular to a preprocessing module for switching audio master and standby receivers. Background technique [0002] Audio is an important medium for multimedia applications. During wireless transmission, audio is often interrupted by receivers. In order to prevent the receiver from affecting the normal transmission of audio signals, a backup receiver is usually equipped when transmitting audio signals. When the main receiver cannot receive normally, the backup receiver is put into use. Today, the switching of the active and standby receivers is done manually. The operation process is cumbersome, time-consuming and labor-intensive, and the normal transmission of audio signals is often affected due to untimely operation. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provides a preprocessing module for sw...

AI Technical Summary

Problems solved by technology

Today, the switching of the active and standby receivers is done manually. The operation process is cumbersome, time-consuming and laborious, and often affects the normal transmission of audio signals due to untimely operation.

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