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參數(shù)資料
| 型號： | TA2012N |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PDIP24 |
| 封裝： | SDIP-24 |
| 文件頁數(shù)： | 20/21頁 |
| 文件大小： | 1451K |
| 代理商： | TA2012N |
TA8132AN / AF , TA2012N / F
2002-10-30
8
The gain loss of FM IF AMP
R2
0
10K (Note)
IF
(10.7MHz)
-20dB
-1dB
M
ode
1 / 8 IF
(1.3375MHz)
-20dB
-1dB
(Note)
·
In the condition of the 1 / 8 IF mode, it is
possible to set up R2 = ∞ (OPEN).
·
In the condition of IF mode, it is necessary to set up the value of R2 under 10k. When the R2 is over
10k it is feared that the mode is change to the 1 / 8 IF mode.
The gain loss of AM MIXER
R2
0
10K
-16dB
-1dB
4. AM low-cut circuit
The AM low-cut action is carried out by the bypass of the high frequency component of
the positive-feedback signal at the AF AMP stage. The external capacitor: C6
by-passes this component.
The cut-off frequency fL is determine by the internal resistance 22k (typ.) and the
external capacitor C6 as following;
(Hz)
6
C
3
10
22
2
1
L
f
p
=
In the case of the AM low-cut function is not needed, set up the value of C6 over 0.47F.
In the condition of C6 ≥ 0.47F, the frequency characteristic has flat response at the low frequency.
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