Monostable Multivibrator 1820-0261; Differential Videoamplifier 1820-0270; Differential Video Amplifier 1820-0270 - HP 5340A Operating And Service Manual

circuit time constants. An internal timing resistor is available by connecting Vcc (pin 14) to pin 9,
also an external resistor may be used between these two pins. The external timing capacitor
connects between pins 10 and 11. The output pulse duration is determined by the
stant of the timing components. The truth table shows the logic states that result in a one-shot
output. When the multivibrator fires, the outputs are independent of further input transitions
and are dependent only on the timing components.
Figure 4-11. Monostable Multivibrator 1820-0261
NC NC
NC
MONOSTABLE MULTIVIBRATORS

4-29. Differential Video Amplifier 1820-0270

4-30. The video amplifier is shown in Figure 4-12. This
output amplifier with differential inputs.
gain and high input impedance. Gain is determined by connecting a resistor from pin 4 to pin 9.
For maximum gain, pins
4
Figure 4-12. Differential Video Amplifier 1820-0270
TIMING
NC
0
A 2
The unit features 120 MHz bandwidth, selectable
and 9 are shorted together.
A
G A I N SELECT
GA . I N G2A SELECT
INPUT 1
INPUT 2
G A I N SELECT
G A I N SELECT
Note:
P i n 5 c o n n e c t e d t o
Theory of Operation
TRUTH TABLE
INPUT INPUT
OUTPUT
INHIBIT
INHIBIT
INHIBIT
ONE SHOT
ONE SHOT
ONE SHOT
ONE SHOT
INHIBIT
INHIBIT
INHIBIT
INHIBIT
INHIBIT
I N H I B I T
NOTES I
2
3
X INDICATES THAT EITHER A
LOGICAL 0 O R I M A Y BE
P R E S E N T
IC
consists of a two-stage differential
OUTPUT 1
OUTPUT 2
case.
Model 5340A
RC
time con-
4-9