JPS5550794A - Wave form shaping circuit - Google Patents

Wave form shaping circuit

Info

Publication number
JPS5550794A
JPS5550794A JP12259278A JP12259278A JPS5550794A JP S5550794 A JPS5550794 A JP S5550794A JP 12259278 A JP12259278 A JP 12259278A JP 12259278 A JP12259278 A JP 12259278A JP S5550794 A JPS5550794 A JP S5550794A
Authority
JP
Japan
Prior art keywords
signal
transistor
added
differential amplifying
wave form
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
JP12259278A
Other languages
Japanese (ja)
Inventor
Teruo Minagawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12259278A priority Critical patent/JPS5550794A/en
Publication of JPS5550794A publication Critical patent/JPS5550794A/en
Pending legal-status Critical Current

Links

Landscapes

  • Processing Of Color Television Signals (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

PURPOSE: To prevent the trouble resulting from the storing time effect by using the unsaturation type current change-over switch.
CONSTITUTION: Two pairs of the differential amplifying circuits using the transistors 20∼23 are combined to constitute the adder 19 and to the common emitter of the differential amplifying circuit comprising one of the transistor 22, 23, the taken out demodulated signal current source from the collector of the transistor 14 is added. To the common emitter of the other differnetial amplifying circuit comprising the transistor 20, 21, the resistance 18 operating as the fixed current source is connected to form the circuitry cnstruction taking out the added signal from the terminal 15 of the collector side. To the terminal 9 between the bases of the two pairs of the differential amplifying circuits, the blanking pulse is added and the taken out signal is changed over from the demodulated signal current to the direct current which does not include the signal, thereby the wave form shaping is performed in the blanking pulse division.
COPYRIGHT: (C)1980,JPO&Japio
JP12259278A 1978-10-06 1978-10-06 Wave form shaping circuit Pending JPS5550794A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12259278A JPS5550794A (en) 1978-10-06 1978-10-06 Wave form shaping circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12259278A JPS5550794A (en) 1978-10-06 1978-10-06 Wave form shaping circuit

Publications (1)

Publication Number Publication Date
JPS5550794A true JPS5550794A (en) 1980-04-12

Family

ID=14839734

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12259278A Pending JPS5550794A (en) 1978-10-06 1978-10-06 Wave form shaping circuit

Country Status (1)

Country Link
JP (1) JPS5550794A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5838092A (en) * 1981-08-29 1983-03-05 Matsushita Electric Ind Co Ltd Color signal controlling circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5838092A (en) * 1981-08-29 1983-03-05 Matsushita Electric Ind Co Ltd Color signal controlling circuit

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