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84
T Y P E
6 0 3
E L E C T R O N I C
M U L T I P L I E R
Figure 82. Application o f Pulse to Trigger Circuit Without Cc Capacitors
Through this anode 'to grid coupling capacitor Cc,
this dip in anode potential of the conducting tube
over-rides the positive pulse on the grid of the
non-conducting tube, producing
a
negative dip as
shown at a2 (Figure 8 1 ) . The dip in the anode po-
tential of the conducting tube shown at a3 is in
this case caused by the same positive pulse acting
on its own grid.
For a positive pulse t o trigger The circuit, the
pulse must be sufficiently positive to overcome the
initial bias plus the negative swing produced at the
grid of the non-conducting rube by the dip in
anode potential of the conducting tube.
If properly designed, triggers such as those de-
scribed above are very stable, dependable, and in-
dependent of reasonable variations in supply po-
tentials.
A
20% varia~ion in either bias or anode
potential supply, or more if both vary together,
can be tolerated.
In order to illustrate the importance of sthe Cc
1
Both Grids attemptino
/to
reach +20V.
+
2 0 -
+
t o - -
-
I
/ I
/
Time
--
Grid
TI
$torts from
- 5 0 V .
Grid T2 starts from
- 2 0 V .
-
6
0
~
Figure 83. Rise in Grid Voltage as Capacitors Discharge
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