pottle@tesla.UUCP (Christopher Pottle) (09/19/84)
<> We are designing a VLSI graphics chip which will output digital gray-level or color pixel information at a clock rate determined by the raster scan rate of a display monitor. We don't know much about state-of-the-art ways to convert this 4- to 8-bit parallel digital information into composite video for a monitor. Designs using a few special-purpose LSI chips must be available, but we haven't been able to access this information. If you can help, please send us mail. Chris Pottle School of EE Cornell Univ. (607)256-4085 UUCP: decvax!cornell!tesla!pottle ARPA: pottle@cornell.ARPA
kdh@hou2h.UUCP (K.HUNTER) (09/29/84)
There is a nice chip recently introduced by Motorola which will convert RGB analog into composite video for you. It takes the video at 1.0V p-p, with a 10K input impedence, and a sync signal, and produces composite output, either PAL or NTSC, depending on the crystal you use, and a strap. The part number is MC1377, and I think that it's only a couple of bucks. The data sheet I have includes the application circuit, as well as one showing an interface to an RF modulator. Sooooo, if you can get it from digital to analog RGB, this will get it to composite. Kevin D. Hunter AT&T Consumer Products Rm 1L-337 Holmdel, NJ 07733