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80C32 computer application notes:

TV test pattern generator

80C32 computer application notes:
To enable the 80C32 generate a TV picture, it requires a digital-to-analogue converter (DAC).This DAC must be capable of working at relatively high frequencies, typically in the MHz range. Here, the DAC ts realized by an R-2R ladder network, which is far less expensive than a dedicated DAC IC. and does the job equally well.
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