Datasheet

NJM2073
-
6
-
Ver.2004-03-01
(2) The Application Example of Voltage Gain Reduction. ( STEREO )
Fig.6 indicates the application example and Table1 indicates the recommendable value of parts to be attached externally.
Table1,Applicating purpose and Recommended Value of Externally parts to be attached.
EXTERNAL
PARTS
APPLICATION PURPOSE
RECOMMENDED
VALUE
REMARKS
R
g
Plus input to be grounded by
fixed DC
Under about 100kΩ Catch the noise when much higher.
R
s
AV shall be decided with R
f
-
R
f
AV shall be decided with R
s
About 5kΩ The co-temperature of AV becomes higher in case when R
S
is
higher resistance.The current from output pin to GND becomes
higher,in case when R
S
is lower resistance.(The current sinks in
vain.)
C
X
Minus input to be grounded by
fixed DC
- Low-band Cut off frequency (fL) is to be decided.
The rise time becomes longer in case that C
X
is big.
C
CUP
Output DC Decoupling When R
L
=8Ω,More
than 220µF
fL shall be decided by C
CUP
and Z
L
.
C
P1
Stabilization of V
+
More than about C
CUP
Inserting near around V
+
pin and GND pin.
C
P2
Prevention of Oscillation More than 0.1µF
r Prevention of Oscillation About R
L
Inserting near around V
+
pin and GND pin.
C Prevention of Oscillation 0.22µF To be examined by about the resistor volume of the speaker load.
Fig.6 STEREO Application Example.