Simpson 460 4 Series - Page 39

Theory of Operation
5.3 INPUT CIRCUITS
5.3.1 DC Voltage Measurements
5.3.2 The basic DC voltage measurement circuit is shown in
Figure 5-2(a). The DC voltage being measured is connected to
the V-9 and COMMON jacks, attenuated according to the range
selected and converted into digital information by the A/D Con-
verter.
NUMERICAL
DISPLAY
ATTENUATOR
(a) D C VOLTAGE
OPERATIONAL
AMPLIFIER
>
у-О
INPUT
AMPLIFIER
ATTENUATOR
COMMON O
NUMERICAL
DISPLAY
DISPLAY
(b) A C VOLTAGE у, Bl
Figure 5-2. Basic Voltage Measurement Circuits
5-3