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M377: Difference between revisions
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About the M377, John Addis says: | About the M377, John Addis says: | ||
<blockquote> | <blockquote> | ||
<p>The M377 was a single channel plugin on a chip with | <p>The M377 was a single channel plugin on a chip with 0 V common mode input and output voltages, | ||
excellent variable gain control, two four pole bandwidth limits, | excellent variable gain control, two four pole bandwidth limits, | ||
three outputs which could be separately inverted and turned on or off. | three outputs which could be separately inverted and turned on or off. | ||
</p> | </p> | ||
<p> | <p> | ||
It was the first wideband analog IC with level shift on chip (allowing | It was the first wideband analog IC with level shift on chip (allowing 0 V common mode input and output and | ||
without PNP transistors), first wideband amplifier with any on-chip bandwidth limit selection, | without PNP transistors), first wideband amplifier with any on-chip bandwidth limit selection, | ||
first to have more than two fixed gain settings (it has six), | first to have more than two fixed gain settings (it has six), | ||
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<gallery> | <gallery> | ||
M377 as u310 and u410 in 11a52.jpg|M377 in an [[11A52]], as U310 and U410. Each M377 chip has a differential output impedance of | M377 as u310 and u410 in 11a52.jpg|M377 in an [[11A52]], as U310 and U410. Each M377 chip has a differential output impedance of 200 Ω. The two chips' outputs are in parallel, driving the output pins of the plug-in with a differential impedance of 100 Ω, or 50 Ω per side. | ||
</gallery> | </gallery> | ||