JPS57127371A - D-a converter for digital television - Google Patents

D-a converter for digital television

Info

Publication number
JPS57127371A
JPS57127371A JP56202238A JP20223881A JPS57127371A JP S57127371 A JPS57127371 A JP S57127371A JP 56202238 A JP56202238 A JP 56202238A JP 20223881 A JP20223881 A JP 20223881A JP S57127371 A JPS57127371 A JP S57127371A
Authority
JP
Japan
Prior art keywords
signal
resistance
common
converter
tr15a
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.)
Granted
Application number
JP56202238A
Other languages
Japanese (ja)
Other versions
JPS5941325B2 (en
Inventor
Sukeyuki Sato
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP56202238A priority Critical patent/JPS5941325B2/en
Publication of JPS57127371A publication Critical patent/JPS57127371A/en
Publication of JPS5941325B2 publication Critical patent/JPS5941325B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Analogue/Digital Conversion (AREA)
  • Picture Signal Circuits (AREA)
  • Television Systems (AREA)

Abstract

PURPOSE:To control the contrast with a simple costitution, by providing in parallel plural units of a series circuit including the 1st and 2nd transistors plus a resistance in accordance with the digitized TV signal and then delivering an analog signal as well as controlling the amplitude of the TV signal. CONSTITUTION:Plural unit of a series circuit including the 1st transistors TR 14a-14n, the 2nd TR15a-15n plus resistances 16a-16n are provided in parallel to a D-A converter for digital TV in accordance with the number of bits of a digitized TV signal to be applied to input terminals 12a-12n. A common resistance 19 is connected between a common joint 17 of the series circuits and a power supply 18; the TV signals supplied from the terminals 12a-12n are applied to the TR14a-14n; and the variable voltage of a variable resistance 20 is applied to the common base of the TR15a-15n. Then an analog TV signal is delivered from the joint 17, and the amplitude of the TV signal is controlled by the resistance 20. Thus the contrast is controlled with a simplie constitution to facilitate an easy integration of a circuit.
JP56202238A 1981-12-14 1981-12-14 D-A converter for digital television Expired JPS5941325B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56202238A JPS5941325B2 (en) 1981-12-14 1981-12-14 D-A converter for digital television

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56202238A JPS5941325B2 (en) 1981-12-14 1981-12-14 D-A converter for digital television

Publications (2)

Publication Number Publication Date
JPS57127371A true JPS57127371A (en) 1982-08-07
JPS5941325B2 JPS5941325B2 (en) 1984-10-06

Family

ID=16454238

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56202238A Expired JPS5941325B2 (en) 1981-12-14 1981-12-14 D-A converter for digital television

Country Status (1)

Country Link
JP (1) JPS5941325B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8689429B2 (en) 2009-07-27 2014-04-08 Nhk Spring Co., Ltd. Method of reworking head suspension

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0243501A (en) * 1988-08-04 1990-02-14 Omron Tateisi Electron Co Lens array

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8689429B2 (en) 2009-07-27 2014-04-08 Nhk Spring Co., Ltd. Method of reworking head suspension
US9070418B2 (en) 2009-07-27 2015-06-30 Nhk Spring Co., Ltd. Cutting jig for reworking head suspension

Also Published As

Publication number Publication date
JPS5941325B2 (en) 1984-10-06

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