Audio

We are developing audio circuits used in familiar products such as televisions, amusement devices, and mobile devices.
SANEI HYTECHS specializes in developing audio circuits that bridge between digital data and analog output,
imbuing their circuits with their unique expertise.
INDEX

Major development achievements in audio circuit

Kinds Main usage
Class D amplifier For TV, for amusement
CODEC for mobile devices

Class D amplifier

Feature

Usage for TV
Power supply 8V-15V
Output power 10W-15W
SP load 4Ω-8Ω
Protective function Overcurrent protection, High temperature protection, DC input detection, Low voltage malfunction prevention

Block Diagram

CODEC

Feature

Usage For smartphones
Power supply 5V
Point
  • Speaker amplifier (Class D), headphone amplifier (Class G), LINE input/output, MIC input, Volume, Mixer, ΔΣDAC, ΔΣADC
  • Start/Shutdown sequence
  • Various functions (Volume, Mixer, PowerLimit)
  • Analog performance (Noise, Distortion, Output power)
  • Protection functions (Overcurrent protection, High temperature protection)
  • Layout of large current paths (Current concentration relief, EM)
  • Power dissipation, Efficiency
  • Pop noise reduction
  • Low power consumption
  • Utilization of MATLAB and SCILAB

Block Diagram

Achievements / Case