Service Manuals, User Guides, Schematic Diagrams or docs for : Agilent journals 1961-02
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HEWLETT-PACKARD
JOURNAL
T E C H N I C A L I N F O R M A T I O N F R O M T H E - d p - L A B O R A T O R I E S
Vol. 12, No. 6
JBLISHED BY THE HEWLETT-PACKARD COMPANY, 1501 PAGE MILL ROAD, PALO ALTO, CALIFORNIA FEBRUARY, 1961
Two Versatile New Power Supplies
for High Power Semiconductor Work
TWO years ago -hp- introduced for tran can be set using front panel meters.
sistor work a small regulated power Besides the current-limiting feature, the
supply which had the property of limiting new supplies include a number of other con
its output current to selectable values for veniences. They are externally program
protection of the circuit under test. This mable so that they can be easily matched to
power supply became very popular and has production-testing situations in which a se
now led to the development of two addi quence of accurate, known voltages is re
tional regulated supplies for higher power quired. The 2-ampere supply is arranged
transistor use and similar applications. One with a second set of output terminals that
of the new supplies provides currents up to enables the output voltage to be sensed and
l/2 ampere at voltages from 0 to 40 volts, regulated at the load itself rather than at
while the other provides currents up to 2 the output terminals. This feature thus over
amperes at voltages from 0 to 60 volts. Both comes the loss in regulation caused by large
supplies incorporate the automatic current- supply currents flowing in the hook-up leads.
limiting feature in which maximum avail In addition to the above conveniences, both
able output current can be prescribed by supplies have isolated output terminals, are
front panel controls to current values that free of spurious turn-on and line voltage ef-
Fig. 2. New -dp- Model 723/4
Fig. 1. f*ew -dp- Model 722AR regulated power supply pro regulated power supply provides
vides up to 2 amperes at voltages from 0 to 60 vdc. For safety to up to i ampere at voltages from
load, maximum available current can be set anywhere between 0 to 40 vdc. Unit is fully transistor
ized and operates at full ratings
1 00 ma and 2.2 amperes. Unit is also designed to compensate for
up to 55° C as does new supply at
effect of hook-up leads on regulation. A companion version of left. Unit is programmable and has
unit is designed to be remotely programmable. current-limiting feature.
P R I N T E D I N U . S . A . C O P Y R I G H T 1 9 6 1 H E W L E T T - P A C K A R D C O .
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