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參數(shù)資料
| 型號(hào)： | CXA1352AS |
| 廠商： | Sony Corporation |
| 英文描述： | 2-channel 5 Elements Graphic Equalizer IC |
| 中文描述： | 2通道5元素的圖形均衡器集成電路 |
| 文件頁(yè)數(shù)： | 8/17頁(yè) |
| 文件大?。?/td> | 216K |
| 代理商： | CXA1352AS |
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CXA1352AS
Description of Operation
1. Graphic equalizer
Conventional system
Fig. 1.
Fig. 1. indicates the conventional graphic equalizer system. This circuit performs boost and cut near “f
O
”
controlled by the variable volume R
V
. (“f
O
” is resonance frequency determined by Z (s) (formed LCR).) The
operation can be seen as follows : When the LCR circuit goes to the far left of R
V
, a state of graphic
equalizer becomes maximum cut. At that time, assuming transmittance as T (s), we have
T (s) =
Z (s)
Z (s)+ R
O
Here as
Z (s) = sL+R+
1
sC
Then
T (s) =
LCs
2
+RCs+1
LCs
2
+ (R+Ro) Cs+1
Defining fo as f
O
=
ω
o
,
ω
o as
ω
o =
1
, and Q as Q =
ω
oL,
2
π
LC
R
we can obtain the frequency
characteristics at cut.
Also, when LCR circuit goes to the far right of R
V
, a state of graphic equalizer becomes maximum boost.
At that time transmittance is :
T (s) =
Z (s) +R
O
Z (s)
=
LCs
2
+ (R+Ro) Cs+1
LCs
2
+RCs+1
Defining fo,
ω
o and Q as for cut, we can obtain the frequency characteristics at boost.
V
I
R
1
R
V
R
2
R
0
=R
1
=R
2
V
O
OPERATIONAL AMPLIFIER
BOOST
CUT
L
C
Z (s)
R
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