JPS554101A - Horizontal deflection driver circuit - Google Patents
Horizontal deflection driver circuitInfo
- Publication number
- JPS554101A JPS554101A JP7595278A JP7595278A JPS554101A JP S554101 A JPS554101 A JP S554101A JP 7595278 A JP7595278 A JP 7595278A JP 7595278 A JP7595278 A JP 7595278A JP S554101 A JPS554101 A JP S554101A
- Authority
- JP
- Japan
- Prior art keywords
- horizontal
- driver circuit
- comparator
- synchronizing signal
- deflection driver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Details Of Television Scanning (AREA)
Abstract
PURPOSE:To prevent the breakdown of the horizontal output transistor of the display unit using CRT with no oscillator, by stopping a horizontal deflection driver circuit from operating when a horizontal synchronizing signal is disturbed. CONSTITUTION:Horizontal synchronizing signal (a) from terminal IN1 is amplified by transistor TRTr3 and supplied to the frequency-voltage converter composed of diode D2 and capacitor C6 via direct-current cutting capacitor C4. Its output (d) is inputted to one terminal of comparator Z1 and reference voltage Vref divided by resistances R6 and R7 is to the other while the output of comparator Z1 is made open in a normal state by setting. Once the frequency of the horizontal synchronizing signal decreases, voltage Vd becomes below reference voltage Vref and comparator Z1 is shorted to cut off TRTr1, so that the horizontal deflection driver circuit will stop operating. Horizontal output transistor Tr2 can therefore be prevented from breaking down.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7595278A JPS554101A (en) | 1978-06-24 | 1978-06-24 | Horizontal deflection driver circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7595278A JPS554101A (en) | 1978-06-24 | 1978-06-24 | Horizontal deflection driver circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS554101A true JPS554101A (en) | 1980-01-12 |
Family
ID=13591057
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7595278A Pending JPS554101A (en) | 1978-06-24 | 1978-06-24 | Horizontal deflection driver circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS554101A (en) |
-
1978
- 1978-06-24 JP JP7595278A patent/JPS554101A/en active Pending
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