10
Basic Circuit Structure and Operating Waveform of
Horizontal-Deflection Output
Main operations
Cy
Damper diode
operation
operation
Measurement conditions
f
H
= 69 kHz (duty 50%)
I
CP
= 5 A
V
CP
= 1200 V
t
s
HV-Tr operation
t
r
HV-Tr
operation
Cy
Damper diode
operation
operation
Operating waveform example
Basic circuit structure
OV
V
BE
I
C
Drive
Circuit
I
B
V
CE
(HV-Tr)
–V
F
(Damper diode)
SBD
V
BE
I
E
I
F
C
y
I
Cy
L
y
I
Ly
OA
I
B
I
B1(end)
I
B1(end)
+ I
B2
t
stg
dI
B
/dt =
t
stg
I
B2
0.9 x I
CP
I
CP
HV-Tr
Damper
diode
V
CC
Measurement range
X-axis
t (time)
2µs / div
OA
I
C
0.1 x I
CP
t
f
Y-axis
V
BE
(Base-emitter
voltage)
I
B
(Base
current )
I
C
(Collector
current )
– I
E
(Reverse
emitter current )
I
F
(Forward
current )
V
CE
(Collector-emitter
voltage)
I
LY
(Deflection
coil current )
I
CY
(Resonance
capacitor current )
5V / div
2A / div
2A / div
2A / div
2A / div
200V / div
2A / div
2A / div
I
Cy
OA
OA
– I
E
I
F
(Damper diode)
Enlarged wave forms of IB and IC
OA
I
B
OA
I
B1(end)
OA
I
Ly
t
stg
I
B2
t
r
=
π
ts
Ly Cy
t
r
0.9 x I
CP
I
CP
I
C
OA
V
CP
0.1 x I
CP
t
f
OV
V
CE
(HV-Tr)
–V
F
(Damper-diode)
2µs / div
9