Toshiba TC9349AFG Manual page 117

3. Electronic Volume Configuration
The electronic volume is composed of a decoder, analog switches and resistors and the control circuit. The decoder,
analog switches and resistors are powered by the V
V pin power supply fluctuates.
DD
VRout1
VRin1
VRcom
VRin2
VRout2
Note: The analog circuit in the electronic volume circuit is powered by the V
Therefore, up to 3 V can be inputted to VRin1/2. The logic section is powered by the V
supply.
Note: Volume switching by the zero cross detection is unavailable, hence noise may occur when the
attenuation is switched.
Note: The VRin1/2 input total resistance is 30 k Ω (typ.).
Note: The electronic volume distortion factor is 0.05% at the typical and 0.1% at the maximum (with VRin = 0.4
Vp-p input).
pin (3 V) power supply, which allows stable operation, even if the
LCD
V
VLCD
LCD
～
44
32
45
31
30
30kΩ
1
0
46
1
30
30kΩ
31
32
47
48
～
117
TC9349AFG
MUTE
VR MUTE
dB
-∞
VR0
VR1
VR2
VR3
VR4
pin (3 V) power supply.
LCD
CPU
2006-02-24
pin power