JPS5644222A - Analogue-digital converter - Google Patents

Analogue-digital converter

Info

Publication number
JPS5644222A
JPS5644222A JP12109079A JP12109079A JPS5644222A JP S5644222 A JPS5644222 A JP S5644222A JP 12109079 A JP12109079 A JP 12109079A JP 12109079 A JP12109079 A JP 12109079A JP S5644222 A JPS5644222 A JP S5644222A
Authority
JP
Japan
Prior art keywords
resistance
transistors
iin
equal
hfe21
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
JP12109079A
Other languages
Japanese (ja)
Inventor
Akira Matsuzawa
Michihiro Inoue
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 JP12109079A priority Critical patent/JPS5644222A/en
Publication of JPS5644222A publication Critical patent/JPS5644222A/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
    • H03M1/12—Analogue/digital converters
    • H03M1/34—Analogue value compared with reference values
    • H03M1/36—Analogue value compared with reference values simultaneously only, i.e. parallel type
    • H03M1/361—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type
    • H03M1/362—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type the reference values being generated by a resistive voltage divider
    • H03M1/365—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type the reference values being generated by a resistive voltage divider the voltage divider being a single resistor string

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)
  • Manipulation Of Pulses (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To improve the conversion precision, by reducing the current flowed to a comparator from the connection point of the resistance line which generates a comparison voltage. CONSTITUTION:Since currents flowed to emitters of transistors 20 and 21 are equal to each other by the current Miller function dependent upon transistors 23 and 24, voltages between bases and emitters of transistors 20 and 21 are equal to each other. Consequently, the voltage applied to resistance RB becomes equal to the voltage applied to resistance RA. Input current iin satisfies iin=ib0-ib1 Ic/2.(1/ hfe20-1/ hfe21.RA/RB), and iin=0 can be ture if the resistance ratio of resistances RA and RB is set to satisfy relation hfe21.RB hfe20.RA.
JP12109079A 1979-09-20 1979-09-20 Analogue-digital converter Pending JPS5644222A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12109079A JPS5644222A (en) 1979-09-20 1979-09-20 Analogue-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12109079A JPS5644222A (en) 1979-09-20 1979-09-20 Analogue-digital converter

Publications (1)

Publication Number Publication Date
JPS5644222A true JPS5644222A (en) 1981-04-23

Family

ID=14802616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12109079A Pending JPS5644222A (en) 1979-09-20 1979-09-20 Analogue-digital converter

Country Status (1)

Country Link
JP (1) JPS5644222A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6019315A (en) * 1983-07-13 1985-01-31 Rohm Co Ltd Switching circuit
JPS6299716U (en) * 1985-12-11 1987-06-25
US7031230B1 (en) 1999-03-08 2006-04-18 Seiko Epson Corporation Starter for electricmagnetic converter, and timepiece

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6019315A (en) * 1983-07-13 1985-01-31 Rohm Co Ltd Switching circuit
JPS6299716U (en) * 1985-12-11 1987-06-25
US7031230B1 (en) 1999-03-08 2006-04-18 Seiko Epson Corporation Starter for electricmagnetic converter, and timepiece

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