JPS5779730A - D-a converter - Google Patents

D-a converter

Info

Publication number
JPS5779730A
JPS5779730A JP55156335A JP15633580A JPS5779730A JP S5779730 A JPS5779730 A JP S5779730A JP 55156335 A JP55156335 A JP 55156335A JP 15633580 A JP15633580 A JP 15633580A JP S5779730 A JPS5779730 A JP S5779730A
Authority
JP
Japan
Prior art keywords
voltage dividing
emitter follower
output
pulse
circuit
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
JP55156335A
Other languages
Japanese (ja)
Inventor
Kazumi Kawashima
Masaaki Fujita
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 JP55156335A priority Critical patent/JPS5779730A/en
Publication of JPS5779730A publication Critical patent/JPS5779730A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters
    • H03M1/82—Digital/analogue converters with intermediate conversion to time interval

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To avoid insensible region, by connecting a voltage dividing resistor between the collector and power supply of a transistor (TR) switched with a pulse having duty ratio on an input digital signal, applying a voltage dividing output to a smoothing circuit and picking up and analog signal from an emitter follower circuit. CONSTITUTION:An input digital signal is applied to a pulse generating circuit 1 and converted into a pulse with a duty ratio on a digital value and applied to the base of a transistor (TR)2. An output of a connecting point between voltage dividing resistors 3a, 3b connected between a power supply VCC and the TR2 is smoothed at a smoothing circuit 8 and the smoothed output is applied to an emitter follower. The insensible region can be eliminated by making the value of the resistors 3a, 3b equal to the VBE of a TR9 of the emitter follower 11.
JP55156335A 1980-11-05 1980-11-05 D-a converter Pending JPS5779730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55156335A JPS5779730A (en) 1980-11-05 1980-11-05 D-a converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55156335A JPS5779730A (en) 1980-11-05 1980-11-05 D-a converter

Publications (1)

Publication Number Publication Date
JPS5779730A true JPS5779730A (en) 1982-05-19

Family

ID=15625520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55156335A Pending JPS5779730A (en) 1980-11-05 1980-11-05 D-a converter

Country Status (1)

Country Link
JP (1) JPS5779730A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63197120A (en) * 1987-02-10 1988-08-16 Casio Electronics Mfg Co Ltd D/A converter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5124833A (en) * 1974-08-23 1976-02-28 Sharp Kk

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5124833A (en) * 1974-08-23 1976-02-28 Sharp Kk

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63197120A (en) * 1987-02-10 1988-08-16 Casio Electronics Mfg Co Ltd D/A converter

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