LG 50PC51 User Manual Page 91

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8
¶∞ƒ∞ƒ∆∏ª∞
∫ˆ‰ÈÎÔ› ˘ÂÚ‡ıÚˆÓ
¢È·ÌfiÚʈÛË Î·Ú¤
1° ηڤ
∂·Ó¿ÏË„Ë Î·Ú¤
µ·ÛÈÎfi˜ ÎÒ‰Èη˜
∂·Ó¿ÏË„Ë ÎÒ‰Èη
¶ÂÚÈÁÚ·Ê‹ bit
ÃÚÔÓÈÎfi ‰È¿ÛÙËÌ· ÌÂٷ͇ ηڤ: Tf
Î˘Ì·ÙÔÌÔÚÊ‹ ÌÂÙ·‰›‰ÂÙ·È fiÛÔ ·ÙÈ¤Ù·È ÙÔ ÎÔ˘Ì›.
Low
custom code
Lead
code
High
custom code
Data code
Data code
C0 C1 C2 C3 C4 C5 C6 C7 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7
Repeat code
Tf
4.5 ms
9 ms
2.25 ms
9 ms
0.55 ms
0.56 ms
1.12 ms
Tf Tf
Tf=108ms @455KHz
0.56 ms
2.24 ms
Bit ”0” Bit ”1”
1. ∆ÚfiÔ˜ Û‡Ó‰ÂÛ˘
™˘Ó‰¤ÛÙ ÙÔ ÂÓÛ‡ÚÌ·ÙÔ ÙËϯÂÈÚÈÛÙ‹ÚÈfi Û·˜ ÛÙËÓ ˘Ô‰Ô¯‹ ÙËϯÂÈÚÈÛÙËÚ›Ô˘ Ù˘ ÙËÏÂfiÚ·Û˘.
2. Kˆ‰ÈÎÔ› ˘ÂÚ‡ıÚˆÓ ÙËϯÂÈÚÈÛÙËÚ›Ô˘
™‹Ì· ÂÍfi‰Ô˘ Î˘Ì·ÙÔÌÔÚÊ‹˜
ªÔÓÔ·ÏÌÈÎfi, Ú˘ıÌÈṲ̂ÓÔ Ì ۋ̷ 37,917KHz ÛÙ· 455KHz
T1
Tc
™˘¯ÓfiÙËÙ· ÊÔÚ¤·
FCAR = 1/TC = fOSC/12
Duty ratio = T1/TC = 1/3
µ·ÛÈÎfi˜
ÎÒ‰Èη˜
÷ÌËÏfi˜ ÚÔÛ·ÚÌÔṲ̂ÓÔ˜
ÎÒ‰Èη˜
À„ËÏfi˜ ÚÔÛ·ÚÌÔṲ̂ÓÔ˜
ÎÒ‰Èη˜
∫Ò‰Èη˜ ‰Â‰ÔÌ¤ÓˆÓ ∫Ò‰Èη˜ ‰Â‰Ô̤ӈÓ
∂·Ó¿ÏË„Ë ÎÒ‰Èη
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