參數(shù)資料
型號： LA71750EM
廠商： SANYO SEMICONDUCTOR CO LTD
元件分類： 消費家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP100
封裝： 14 X 20 MM, QFP-100
文件頁數(shù)： 43/46頁
文件大?。?/td> 898K
代理商： LA71750EM
LA71750EM
No.7952-6/46
Continued from preceding page.
Input signal
Input/Output
point
Ratings
Parameter
Symbol
Sign
al
Level
In
Out
Conditions
min
typ
max
Unit
Total Output Level of
PB-Y
(expect M mode)
TGPBN
SG6
A : 300
T79A
T65
Input the PAL signal that FM modurated (DEV
= 1MHz) has a white signal 100% to T79A, and
measure the amplitude of T65.
1.95
2.05
2.15
Vp-p
Total Output Level of
Over All Y
(expect M mode)
TGRPN
TGPBN×FDEVN
1.95
2.05
2.15
Vp-p
FM Demodulator
Linearity
LDEM
SG5
300
T79A
T74
Input a SIN wave (3MHz, 4.5MHz, 6MHz) from
T79A.
Measure the average DC electric potential of
the SIN wave of T74.
DC in 3MHz, DC in V3, 4.5MHz, DC in V4.5,
6MHz, as V6,
LDEM =
×100
-3.5
0
3.5
%
FM Demodurator
Leakage
CL
SG5
(4MHz)
DC
300
PPSLD
T79A
T23
T74
Add the voltage of PPSLD that it was measured
in T23, and the SIN wave of 4MHz is inputted
from T79A.
Measure the 4MHz element f4 of the SIN wave
of T74.
CL = 20log (f4/500mVp-p).
-30
dB
DOC Compensation
Period
TDOC
SG1
SG6
A : 150,
B : 350,
A : 300
→0
T74A
T79A
T65
Input a white signal to T74A 100%.
Cut signal course to 43 PIN from 46 PIN.
The white signal of T65 measures the time until
it reverts after the SIN wave of 4MHz is inputted
to T79A and this SIN wave is stopped.
10.5
12.5
14.5
H
DOC Compensation
Level
GDOC
SG1
SG6
A : 150,
B : 350,
B : 300
→0
T74A
T79A
T65
Measure the amplitude VAF of T65 after 5H,
and calculate it at the next type in the
measurement of TDOC after the amplitude
VBF of T65 in front of 10H which a SIN wave is
stopped at and a SIN wave are stopped.
GDOC = 20log (VAF/VBF).
-1.5
0
1.5
dB
R/P-EQ
Input signal
Input/Output point
Ratings
Parameter
Symbol
Signal
Level
In
Out
Conditions
min
typ
max
Unit
REC-FM level 1 to
level 4
VFM1
to
VFM4
SG1
A:300mVp-p
B:700mVp-p
T48A T78A Measure the T78A output level.
270
320
370
450
550
470
mVp-p
REC-EQ
characteristics 1-1
4MHz 300mVp-p
GREQ11
SG5
SG1
f=4MHz,
300mVp-p
A=300mVp-p
B=700mVp-p
T81A
T48A
T78A With VIN a CW 4MHz, 300mVp-p signal,
measure the input/output response.
T77 : DC1.6V
-7
dB
REC-EQ second
distortion
4MHz 300mVp-p
HREQ
SG5
SG1
f=4MHz,
300mVp-p
A=300mVp-p
B=700mVp-p
T81A
T48A
T78A Measure the second distortion with the above
state.
T77 : DC1.6V
-40
-35
dB
REC-EQ
characteristics 1-2
2MHz 300mVp-p
GREQ12
SG5
SG1
f=2MHz,
300mVp-p
A=300mVp-p
B=700mVp-p
T81A
T48A
T78A Measure the input/output response,and take
the difference with GREQ11.
T77 : DC1.6V
3
dB
REC-EQ
characteristics 2-2
650KHz 300mVp-p
GREQ22
SG5
SG1
f=650kHz,
300mVp-p
A=300mVp-p
B=700mVp-p
T81A
T48A
T78A Measure the input/output response,and take
the difference with GREQ11.
T77 : DC1.6V
-20
dB
FM-AGC-LEVEL
4MHz 300mVp-p
VPFMAGC SG1
f=4MHz,
300mVp-p
A=150mVp-p
B=350mVp-p
T79A
T74A
T76A Measure T76A output level (M)
300
mVp-p
Continued on next page.
V4.5-(V3+V6)/2
V6-V3
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