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參數(shù)資料
| 型號： | LA1867NM |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Car Radio Single-Chip Tuner System |
| 中文描述： | 汽車無線電單芯片調(diào)諧器系統(tǒng) |
| 文件頁數(shù)： | 17/32頁 |
| 文件大?。?/td> | 941K |
| 代理商： | LA1867NM |
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Continued from preceding page.
MRC Block Applications
No. 4619-17/32
LA1867NM
Pin
Function
Equivalent internal circuit
Note
12
MRC output pin
Pin
Function
Equivalent internal circuit
Note
34
MRC control voltage time
constant
15
MRC AC input pin
34
MRC control voltage time
constant
16
Time constant setting pin
constant
In methods in which the S-meter AC
components are detected directly, the noise
amplifier gain is determined by R
2
and the
30 k
internal resistance, as shown in
Figure 1. A certain degree of filtering
characteristics can be provided with
capacitor C
1
.
In methods in which the S-meter high area
components are detected, or the NC HDF
noise output is detected, the noise amplifier
gain is determined by R
2
and 30 k
as
shown in Ffigure 2. Here, the frequency
characteristics are determined by C
1
.
During discharge, the MRC detector time
constant is determined by R
S
(1 k
) and
C
A
. During charge, it is determined by I
C
and C
A
.
Attack time = C
A
×
R
S
(Stereo
→
mono)
Recovery time = C
A
×
R
A
(Mono
→
stereo)
Unit (resistance:
, capacitance:F)
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