IC LA3600 is a single chip “Audio5 channel” that is designed specifically for the equalizer five channels. Audio with IC LA3600 above can control the frequencies from 108 Hz to 10.8 KHz. Audio frequency which is controlled by this equalizer was 108 HZ, 343 Hz, 1.08 KHz, 3.43 KHz and 10.8 KHz. The frequency of that frequency is set based on the value of 2 pieces of capacitors in each chanelnya. So for instance want to change the center frequency of each channel value of 2 pieces of the capacitor can be changed as desired.
- On-chip one operational .
- 5-band graphic equalizer for one channel can be formed easily by externally connecting capacitors and variable resistors which fix fo (resonance frequency).
- Series connection of two LA3600’s makes multiband (6 to 10 bands) available.
- Highly stable to capacitive load.
Circuit Diagram Of
Fo (resonance frequency) Of
In the sample application
fo=108Hz, 343kHz, 1.08kHz, 3.43kHz, 10.8kHz
Description of external parts 5-BandLA3600
C1, C2 : Capacitors used to fix fo (resonance frequency)
C2 : Input capacitor. Decreasing the capacitor value lowers the frequency response at low frequencies.
C3 : Input capacitor. Decreasing the capacitor value lowers the frequency response at low frequencies.
C4 : Decoupling capacitor. Decreasing the capacitor value makes the effect of stronger, whereby ripple is liable to occur.
C5 : Power capacitor.
C6 : Output capacitor. Decreasing the capacitor value lowers the frequency response at low frequencies.