Tone regulation and control circuit based on NE5532 chip

Abstract

The invention discloses a tone regulation and control circuit based on a NE5532 chip; the tone regulation and control circuit comprises the following parts: a pre-stage amplification circuit with twoinput ends respectively connected with a left channel audio signal and a right channel audio signal, the pre-stage amplification circuit comprises an amplifier U1A and an amplifier U1B, the amplifierU1A and the amplifier U1B are integrated in the NE5532chip, and respectively are used for amplifying the left channel audio signals and the R channel audio signals; a tone control circuit with two input ends respectively connected with output ends of the amplifier U1A and the amplifier U1B, the tone control circuit is used for respectively adjusting low pitch, middle pitch and high pitch for the two paths of audio signals amplified by the amplifier U1A and the amplifier U1B; a volume adjusting circuit used for adjusting volumes of the two paths of audio signals. The tone regulation and controlcircuit can better amplify, rectify and filter sounds and make fidelity treatment, and can remove unnecessary interferences, thus further obtaining better sound quality.

Description

technical field [0001] The invention relates to an audio signal adjustment circuit, in particular to a tone adjustment circuit based on the NE5532 chip. Background technique [0002] Due to the limited space in modern family rooms, audio miniaturization is also a development direction of consumer audio products, and the timbre of small and medium speakers is prone to problems such as thin and delicate. Commercially available tone boards include finished speakers, most of which are sharp and harsh, especially the bass is blurred, not to mention the subwoofer, which cannot meet the requirements of ordinary home audio. In addition, most of the audio equipment on the market today needs tone boards to compensate for the fact that the preamplifiers and power amplifiers are not of the highest quality. However, most of the tone boards on the market, including finished audio, are sharp and piercing, and the bass is fuzzy, especially The subwoofer effect is poor and cannot meet the n...

AI Technical Summary

Problems solved by technology

Commercially available tone boards include finished speakers, most of which are sharp and piercing, especially the bass is fuzzy, not to mention the subwoofer, which cannot meet the requirements of ordinary home audio

In addition, most of the audio equipment on the market today needs tone boards to compensate for the fact that the preamplifiers and power amplifiers are not of the highest quality. However, most of the tone boards on the market, including finished audio, are sharp and piercing, and the bass is fuzzy, especially The subwoofer effect is poor and cannot meet the needs of consumers

[0003] Existing audio signal conditioning circuits usually use multiple amplifiers and multiple filters, including a circulator, a switch limiter, a first power amplifier, an attenuator, a transceiver switch, a third power amplifier, a second filter, and a limiter , the second power amplifier, etc., which not only ensure the signal-to-noise ratio of the signal, but also ensure the gain of the signal, and provide a certain amount of power for subsequent signal analysis or signal transmission, but such circuits still have complex circuit structures and high costs. , poor sound quality and other issues, unable to meet user needs

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