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Engineering Digital Design
book

Engineering Digital Design

by Richard F. Tinder
January 2000
Intermediate to advanced content levelIntermediate to advanced
884 pages
29h 39m
English
Academic Press
Content preview from Engineering Digital Design
850 APPENDIX A / OTHER TRANSISTOR LOGIC FAMILIES
FIGURE A.1
A.2 INTRODUCTION TO THE TTL LOGIC FAMILY
The standard transistor–transistor logic (TTL) family is composed mainly of bipolar junc-
tion transistors (BJTs) and resistors. Shown in Fig. A.4 are three examples of standard
TTL gates. In these figures B is the base, E is the emitter, and C is the collector. The phe-
nomenological operation of these gates can be easily understood by first considering the
inverter. Qualitatively, the TTL inverter operates as follows: When X
in
is at LV (E = LV),
transistor T
1
forces transistor T
2
to be turned OFF, thereby bringing X
out
to V
CC
level, hence
X
out
=HV. But when ...
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Publisher Resources

ISBN: 9780126912951