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UD-300
34
CIRCUIT DESCRIPTION
The TDA3810 integrated circuit provides spatial , stereo and pseuod-stereo sound for radio and television equipment.
Features
@ Three switched functions: Spatial (widened stereo image )
Stereo
Pseudo-stereo (artificial stereo from a mono source)
@ Offset compensated operational amplifiers to reduce switch noise
@ LED driver outputs to facilitate indicator of selected operating mode
@ Start/stop circuit to rediuce switch noise and to prevent LED-flicker
@ TTL-compatible control inputs
vP
TDA3810
left
channel
0.1SuF
I>
»>——_—-
from
pin
6
15
af.
os
output
4
"i F
-
From
ee?
oe
14
input
pin
13
a
right
cere
=
i
4. 7aF
channel
}
LED
sept
8
right
channel
>
>
PSEUD1O-3TEREO
11
7Z90116.2
ipsa,
CONTROL
INPUTS
Truth table
:
MODE
PI
14)
PIN 12
Control input state
LED
LED
Ke
LOW =0 to 0,8 V (the less positive voltage )
HIGH=2V to 5,5 V (the more positive voltage )
X — =don't care
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