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Keysight E3634A User Manual

Keysight E3634A
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Tutorial 7
Keysight E3633A and E3634A User’s Guide 195
If no load resistor is attached to the power supply output terminal, then the output
voltage will rise linearly at a rate of C
O
/I
L
when programmed upward, and TR =
C
O
(E
2
-E
1
)/I
L
, the shortest possible up-programming time.
Figure 7-9 Speed of response - programming down
Figure 7-9 shows that when the power supply is programmed down, the regulator
senses that the output voltage is higher than desired and turns off the series
transistors entirely. Since the control circuit can in no way cause the series
regulator transistors to conduct backwards, the output capacitor can only be
discharged through the load resistor and internal current source (I
S
).
The output voltage decays linearly with slope of I
S
/C
O
with no load and stops
falling when it reaches the new output voltage which has been demanded. If full
load is connected, the output voltage will fall exponentially faster.
Since up-programming speed is aided by the conduction of the series regulating
transistor, while down programming normally has no active element aiding in the
discharge of the output capacitor, laboratory power supplies normally program
upward more rapidly than downward.

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Keysight E3634A Specifications

General IconGeneral
BrandKeysight
ModelE3634A
CategoryPower Supply
LanguageEnglish

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