Integrated circuit of imitative alarm sound, and alarm device

Abstract

The invention belongs to the technical field of electronic circuits, and provides an integrated circuit of imitative alarm sound, and an alarm device; the integrated circuit comprises a control module, an oscillator module, a frequency division module, a beat module, an address module, a ROM module, an audio module and an output module, wherein the control module obtains a triggering signal and areset signal, can control a working or stop status of the integrated circuit through the triggering signal and can drive a sound generation device through the reset signal to generate alarm sound; when the triggering signal is in a first level status, the oscillator module generates an oscillation signal, performs frequency division for many times for the oscillation signal to obtain multiple paths of coded signals, and if coded combination in the multiple paths of coded signals is changed, the audio module performs frequency division for the oscillation signal and then obtains the audio signals with different audio frequencies. With the integrated circuit and the alarm device provided by the invention, a problem that the existing integrated circuit cannot change the audio frequency of thealarm sound and the circuit structure cannot be designed flexibly is solved.

Description

technical field [0001] The invention belongs to the technical field of electronic circuits, in particular to an integrated circuit and an alarm device for imitating alarm sounds. Background technique [0002] In the existing fire truck alarm devices, the existing technology often uses analog sound chips to realize the function of fire trucks to emit alarm sounds. An integrated circuit containing an analog sound chip is designed in the alarm device, and the sound device is driven by the analog sound chip. Circularly send out the fire truck siren; therefore, there are at least the following problems in the integrated circuit that imitates the siren in the existing fire truck: When the integrated circuit of the alarm sound is installed, the integrated circuit can only drive the sounding device to generate a fixed frequency alarm sound, that is, the audio frequency of the alarm sound cannot be adjusted; 2. The circuit structure of the integrated circuit that imitates the alarm s...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides an integrated circuit and an alarm device for imitating alarm sounds, aiming to solve the problem that the existing integrated circuits for imitating alarm sounds cannot change the audio frequency of the alarm sound and the circuit structure cannot be flexibly designed

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