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參數資料
| 型號： | LA71598HM |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封裝： | 14 X 20 MM, QIP-100 |
| 文件頁數： | 4/18頁 |
| 文件大?。?/td> | 1664K |
| 代理商： | LA71598HM |
LA71598HM
No.A0236-12/47
[PAL/SECAM Discrimination]
As for this IC, PAL/SECAM discrimination operates as below.
(1) On REC/EE mode, take Hi output when input PAL-GBI signal and Lo output when input SECAM or MESECAM
signal. On PB mode, takes Hi output when input PAL-GBI signal, Lo output when input MESECAM signal, and
becomes unstable when input SECAM signal. But MESECAM signal when playback both LP and TRICK it takes
unstable. And takes unstable all of REC/EE/PB when input PAL-M or PAL-M signal.
(2) On NAP mode in PB, takes Hi output, and not depend on the kind of input signal.
(3) In case of non-signal of input, takes high output except for on LP mode when Trick mode.
(4) On REC/EE mode, takes Hi output when there are no burst or when takes smaller burst than the SPEC which
shows below except for the case of above (3).
(5) On PB mode, takes unstable output when it has smaller burst than the SPEC which shows below except for the case
of above (2), (3).
(6) It is possible to adjust small discrimination characteristics at T73. The side of high output becomes strong in case
of increase T73 voltage. T73 has high sensitivity, so that we recommend to add voltage to take regulator voltage as
base which receive no influence of VCC changings.
(7) T69 has high impedance, so that to set leak current lower than a few nA on P board. Insert operation Amp when
monitor T69.
(8) We dare to not recommend to PAL/SECAM discriminate to take as base for T70 voltage because of voltage get to
unstable at PB MESECAM signal.
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