High-definition sound processor

The BA3880AS and BA3880AFS are sound processor ICs that perform phase and harmonic compensation on audio signals to accurately reproduce the "rise" section of audio signals that determines the characteristics of the sound, and thus reproduce the original recording as naturally as possible.

Circuit Diagram:

Circuit diagram for high-definition sound processor

Datasheet for BA3880: Download

Bass Boost System for radio players

The BA3870 is a bass boost audio IC for radio cassette players. BBS adjusts the base boost to a level appropriate for the volume, achieving a rich sound without distortion. Frequency characteristics can be set externally, enabling system design to meet the needs of the application.
Circuit diagram:

Circuit diagram for Bass Boost System for radio players

Datasheet for BA3870: Download

Dual-channel electronic volume controller

General Description:

The BA3853BFS is a dual-channel electronic volume controller built around a low-noise, low-distortion VCA. It is suited for car-audio applications, and has performance that rivals mechanical-type volume controllers. In addition to volume control, the IC includes all functions required for controlling sound quality, to allow more compact designs with far fewer components.

Circuit diagram:

Dual-channel electronic volume controller

Datasheet for BA3853: Download

Preset equalizer sound control

General Description:
The BA3842F is a preset graphic equalizer IC with dynamic bass boost which is designed for audio equipment.

Block diagram:

Bloc diagram for preset equalizer sound control

Datasheet for BA3842: Download

Graphic Equalizer for Headphone Stereos

General Description:

The BA3840KV is a preset graphic equalizer IC for headphone stereos. It combines two equalizer circuit channels ona single chip, and also includes a dynamic sound leak reduction circuit.

Circuit diagram:

Graphic Equalizer for Headphone Stereos

Datasheet for BA3840: Download

Vocal fader IC

General Description:

The BA3837, BA3837F and BA3838F are ICs with an internal secondary active LPF for vocal cancellation functions and mixing amplifier functions with high degrees of vocal cancellation. Three control pins are used to switch between modes: the key controller input mode, through mode, vocal fader mode, sound multiplexing mode and mute mode. By offering these functions on a single chip, these ICs can significantly reduce the number of external components.

Circuit diagram:

Vocal fader IC

Datasheet for BA3837: Download

Band-pass filter for spectrum analyzer

General Description:

The BA3826S is a 7-band ( 2), band-pass filter that uses microprocessor time division to output in serial to left and right stereo channels. To minimize the number of external components required and enable compact and reliable designs, all of the capacitors for the filters are on the chip.

Circuit diagram:

Band-pass filter for spectrum analyzer

Datasheet for BA3826S: Download