Star Tech Journal

30
STAR*TECH JOURNAL/FEBRUARY 1984 •
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The names of various Laserdisc Games
comprise this issue's word puzzle. Find and
encircle these words as they appear below.
They run vertically, horizontally, diagonally
and sometimes backwards.
LASERDISC GAMES
CNNCMDMROL
ULOBOSZEHT
Kl IGERNDAE
PVKFAGSICE
V S V N F R A R F
J
VHWKSMDARA
PPXYBOLTKT
DVQDNLISSI
GUWSXAWEBN
PSEHSLUYEQ
KSDTAQTCSA
LMRNECAQGH
WOGBAEBDWC
NZUMCLXNMW
PCJAAODNUA
E I P P F C V A X T
N S C E B D H F B L
NJRZYWSMFZ
B I Y J J S D Y Z P
F F B I Z X H I T L
BEGA
DRAGON
STARIDER
MACH
FIREFOX
CUBEQUEST
CLIFF
BADLANDS
ASTRON
SPACEACE
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82. TTL (transistor-transistor logic), DTL (diode-transistor logic), and ECL
( emitter-coupled logic), which are frequently used to refer to certain "families"
of digital integrated circuits, are actually names of
a. Companies that originated the families.
b. Alternatives to positive and negative logic.
c. Varieties of positive and negative logic.
d Special semiconductor devices similar to transistors.
e. General varieties of electronic circuits used as logic gates, from which, in
essence, the building blocks in each series are constructed.
lnQuizitive Answers (January)
75)b
76)c
77)a
78)a
Your address label contains your subscriber account number in the top right.
M
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81. The power dissipation specification of most discrete semiconductor devices is
the absolute maximum heat production the device is guaranteed to withstand.
But the power dissipation specification normally discussed for digital building
blocks (usually not formally guaranteed on the data sheet) is
a. The same as that for most discrete semiconductor devices.
b. The amount of power consumed and converted to heat in normal operation.
c. A minimum limit required to maintain high enough operating temperatures.
d Fan-out multiplied by noise margin.
e. Really not a matter of power dissipation at all.
MOVING? QUESTIONS?
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80. "Operating speed" is the general name for the speed capability of any
semiconductor device or circuit. In the data sheet of a digital building block, it
is typically expressed in terms of
a. Transition frequency fT.
b. Capacitance C.
c. Miles per hour, or centimeters per second.
d Propagation delay times for both possible output transitions: tpHL and
tpLH.
e. The "warm-up" time delay after the power is turned on until normal
operation is possible.
Distributor-sponsored S*TJ Technical Seminars are available at no cost to any
distributors interested in assisting their clients understand operation and maintenance
of videos, pins and lasers.
The 5-day course covers Basic Electronics ( electron theory and semiconductors),
Video Game Systems (power supplies, control panel interfaces, rasterscan and X-Y
monitors), Electronic Pinball Systems ( electronic digital systems), Troubleshooting
Techniques, Test Equipment (digital multimeters and logic probes), Proper
Soldering Techniques, Laser Disc Operation and Maintenance, How to Read
Electronic Schematics and other essential skills.
If you'd like to sponsor an S*TJ Technical Seminar, contact Star*Tech
Journal at 609/662-3432 and ask for our information package. This package helps
you plan your promotion for a successful seminar.
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79. The fan-out capability of a digital building block depends on the current
capability of its output and the current requirement of each input driven by that
output, and may be defined as
a. The number of other inputs that can transmit to one input.
b. The maximum power dissipation (heat generation) that the unit can stand.
c. The amount of cooling (fanning the heat out) required.
d The number of inputs that one output can transmit to.
e. b and c above.
StaNtTech Journal Technical Seminars
Here is the answer key
January's puzzle:
VIDEODISC GAME
MANUFACTURERS
y
IN
s
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