LV1150
Operating Principles
1. Modes
The mode can be set using DIP switches on pins 2 and 3.
• Bypass/virtual: switches between bypass and virtual modes.
• L+R/L–R: Switches the virtual mode effect.
Since this switching is independent of the bypass function, it has no effect in bypass mode.
2. Other notes
• The level of the virtual effect can be changed by the values of the external resistors connected to pins 15 and 19.
(See the sample application circuit diagram.) Note that the effect is maximum when these pins are open.
• There are two options that may be attached to pins 6 and 7 and pins 9 and 10. (See the sample application circuit
diagram.) High boost (SAMP1) and low boost (SAMP2) effects can be acquired using external circuits on these
pins. (See the charts.)
VO — fIN
VO — fIN
0
5
0
5
L→L
R→R
–5
R→L
L→R
–10
10 kΩ
0
20 kΩ
0.15µF 1.5 kΩ 1.5 kΩ
–5
external
–15
23
LV1150 SAMP1
DELAY = OFF (19 PIN ⇔ 16PIN Short)
300 mV = 0 dB
5 7 100 2 3 5 7 1k
2 3 5 7 10k
–10
23
Input frequency, fIN — Hz
L→L
R→R
–5
10 kΩ
L→R
0
20 kΩ
–
+
–10
3 kΩ
0.15µF
1.5 kΩ
–5
external
–15
23
LV1150 SAMP2
DELAY = OFF (19 PIN ⇔ 16PIN Short)
300 mV = 0 dB
5 7 100 2 3 5 7 1k
2 3 5 7 10k
–10
23
Input frequency, fIN — Hz
Pin Descriptions
Pin No.
Pin
Pin voltage (V)
Function
Equivalent circuit
2
SW1
3
SW1
0/0.7
Bypass/virtual switching
L+R/L–R switching
1 kΩ
2
3
A12418
4
LPF1
5
LPF2
6
LS-OUT
10
RS-OUT
7
R-PS-IN
9
L-PS-IN
1/2VCC
1/2VCC
1/2VCC
Low-pass filter capacitor connection
Surround signal outputs
Virtual surround processing signal inputs.
24 kΩ 500 Ω
BIAS
4
5
VCC
100 Ω
6
10
BIAS
A12419
A12420
500 Ω
7
9
A12421
Continued on next page.
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