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2. OPERATION OF VERTICAL
1) In the picture above, (a) shows a fixed Vcc, and (+)(-)current of deflection coil is (d) whichk is sum of (b) and
(c), and (e) shows EMITTER voltage of Q3,Q4.
2) Collector loss of Q3 is i1 Vce1 which is the product of obligue region of (b),(e).Collector loss of Q4 is product
of dot region of (c),(e).
3) To reduce collector loss of Q3,if bring down the voltage during scanning time as shown in the picture (b) ,
Vce1 become lower so that the loss diminish.
(a)
VCC
Q3
i1
VCC1
Q4
Q2
i2
VERTICAL OUTPUT WAVE
Diminish if Q3 Collector Loss
OUTPUT VOLTAGE
GND
GND
GND
VCC
1/2 VCC
GND
Blanking Time
Voltage
17
(b) Q3 Collector
Current i1
(c) Q4 Collector
Current i2
(d) Current of
Deflection coil
i1 + i2
(e)Emitter Voltage
Sanning Time
Voltage
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