參數(shù)資料
型號(hào)： LM1893N
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 通信及網(wǎng)絡(luò)
英文描述： RES 250K-OHM 1% 0.125W THICK-FILM SMD-0805 5K/REEL-7IN-PA
中文描述： SPECIALTY TELECOM CIRCUIT, PDIP18
封裝： PLASTIC, DIP-18
文件頁(yè)數(shù)： 18/24頁(yè)
文件大小： 576K
代理商： LM1893N
TL/H/6750–33
FIGURE 30. A simple carrier amplitude detector with output low when carrier is detected
TL/H/6750–34
FIGURE 31. A simple linear analog audio transmitter and receiver are shown.
The carrier and 1.6V inputs are derived from the carrier detector ofFigure 30.
The remaining 2 LM339 comparators may be used to build the carrier detector circuit.
Communication and System
Protocols
(Continued)
sion in a system. Its first purpose is to put data in a base-
band digital form that is more easily recognized as a real
message at the receive end. Secondly, it incorporates en-
coding techniques to ensure that noise induced errors do
not easily occur; and when they do, they can always be
detected. Lastly, the software algorithms that are used on
the receive end to decode incoming data prevent the recep-
tion of noise induced ‘‘phantom’’ messages, and insure the
recovery of real messages from an incoming bit stream that
has been altered by noise.
2. System protocol: the manner in which messages are co-
ordinated between nodes in a system. Its first purpose is to
ensure message retransmission to correct errors (hand-
shake). Secondly it coordinates messages for maximum uti-
lization and efficiency on the network. Lastly, it ensures that
messages do not collide on the network. Common system
protocols include master-slave, carrier detect multiple ac-
cess, and token passing. Token passing and master slave
have been found to be the most useful since they are inher-
ently collision free.
Both protocols usually reside as software in a single micro-
controller that is connected to the LM1893/2893 I/O. In any
case, some sort of intelligence is needed to process incom-
ing and outgoing messages. UARTs have no usefulness in
18
相關(guān)PDF資料
PDF描述
LM2893M LM1893/LM2893 Carrier-Current Transceiver
LM2893N LM1893/LM2893 Carrier-Current Transceiver
LM2895 AUDIO POWE RAMPLIFIER
LM1895 AUDIO POWE RAMPLIFIER
LM1895N AUDIO POWE RAMPLIFIER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM1893N/A+ 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Carrier/Multi-Wire Interface
LM1893N/B+ 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Carrier/Multi-Wire Interface
LM1894 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Dynamic Noise Reduction System DNR
LM1894M 制造商:Panasonic Industrial Company 功能描述:IC
LM1894M/NOPB 功能描述:IC DYNAM NOISE REDUCT SYS 14SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> 線性 - 音頻處理 系列:- 其它有關(guān)文件:STA321 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:Sound Terminal™ 類(lèi)型:音頻處理器 應(yīng)用:數(shù)字音頻 安裝類(lèi)型:表面貼裝 封裝/外殼:64-LQFP 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:64-LQFP EP（10x10） 包裝:Digi-Reel® 其它名稱(chēng):497-11050-6
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