Table of Contents
Advertisement
Section
IV
Paragraphs 4-17
to 4-20
4-17.
TRIGGER OUTPUT
CIRCUIT.
C 33 and R 77 differentiate the square wave output of
the Schmitt trigger.
Q 27 amplifies the signal and
provides the negative output trigger pulse. Q 28
inverts the polarity of the spike to provide the
positive output trigger pulse.
4-18.
6002 AMPLIFIER.
Transistors Q 43 through Q 45 and Q3/Q@4 amplifier
the Schmitt trigger square wave to provide the 600
output pulse.
A negative output is taken from the
collectors of Q3/Q4 and fed through R 6 (AMPLITUDE
control) to the output connector. Diode CR 36 func-
tions as a protective device against any inductive
load.
4-19.
5082 OUTPUT
The drivers and output amplifiers Q 37 through Q 42
form the 502 output circuit. Voltage source @ 35 and
Model 211B
Q 36 regulate the base potentials of driver transistors
Q 39 and Q 42 to provide the AMPLITUDE
VERNIER
control.
Output attenuator A 1 provides step attenu-
ation of the negative 50Qoutput pulse.
4-20.
POWER SUPPLY.
The power
supply operates from either 115 or 230 V
ac which is rectified
and regulated
to provide
dc
output of -20 V, -70 V and +6.8 V. Two seperate
primary windings of transformer T 1 are switched by
S 2, in parallel for 115 V operation or in series for
230 V operation.
The -20 V and -70 V supplies
operate
in a similar manner.
Error amplifier transistors Q 5
or Q 8 sense and amplify any change in output voltage.
The change is applied
through regulator control
transistor Q 6 and Q 7 to series regulators Q 1 and
Q 2 which act as variable series resistors
in the
circuitry path. Diode CR 10 in the -70 V supply limits
the initial voltage across Q 2. The +6.8 V supply is
filtered by R 20 and C 14 and regulated by zener
diode and CR 9.
Advertisement
Table of Contents
