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