WIRELESS WORLD TELETEXT DECODER - 6. LOWER-CASE CHARACTERS AND ANALOGUE CIRCUITS.

被引：0

作者：

Daniels, J.F.

机构：

来源：

| 1600年 / 82期

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D O I：

暂无

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

This sixth article deals with the construction of a Teletext decoder for use with a color TV receiver, considers lower-case character generation and analog circuits. A read only memory contains 32 lower-case characters. An analog circuit board serves three main functions, namely to provide feeds to the digital boards of mixed syncs, separated data, and a switched clock waveform which is suitable both for the writing of data into the store and for reading it out during the display period.

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