Casio DH-500 Service Manual & Parts List page 25

Refernce
Vohage
Generator
@
x;
l l
lr,/
lr./
l r , /
t y '
. r 1 . ,
No
Soft Strong
Breath
DAC 1
CPU digitizes the input voltage level from the Comparator.
Since the variation range of Breath Sensor Block is too small, the CPU
amplifies the breat strength data digitafly.
Digital breath strength data PAO - PA7 is conveded in a voltage level by DACl which is made up by resistive
ladder network.
The output voltage of DAC1 is provided to VCA and VCF.
Breath Strength
Strong
PC6
DACl
i sorc
PA2
;