JPS554101A - Horizontal deflection driver circuit - Google Patents

Horizontal deflection driver circuit

Info

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
Application number
JP7595278A
Other languages
Japanese (ja)
Inventor
Akira Takakoshi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7595278A priority Critical patent/JPS554101A/en
Publication of JPS554101A publication Critical patent/JPS554101A/en
Pending legal-status Critical Current

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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.
JP7595278A 1978-06-24 1978-06-24 Horizontal deflection driver circuit Pending JPS554101A (en)

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)

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