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The lit bit

One of our best sources ofmation concerning new device

cations is the literature publishsemiconductor manufacturers. Dtheir value and expense of p

tion, these pub li ca tions o ftavailable either free or for a ncharge.

Depending on the produ

the publisher, individual publi

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using this for pulse-width modulof the signal used to drive the

lington switch. A UJT relaxationcillator serves as the basic 9 kHznal source.

Delcos complete application includes not only the circuit diag

but basic design mathematics, a

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cussion of circuit theory, performancecurves, all parts values, and evenwinding details for assembling a suit-able choke.

A number of useful publications

are available from the Sprague Prod-ucts Co. (North Adams, Mass. 01247including a 5 page Semiconductor Re-placement M anual, Manual K-500, a

40-page IC catalog, and a new series

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line of linear and Hall Effectfunctional electronic circuits, thin

resistor arrays and hybrid circuits,digital and logic devices. The caincludes device specifications, termconnections, internal schematic

grams, package outlines and suggapplications.