JPS57181224A - Reference voltage setting circuit - Google Patents

Reference voltage setting circuit

Info

Publication number
JPS57181224A
JPS57181224A JP6031581A JP6031581A JPS57181224A JP S57181224 A JPS57181224 A JP S57181224A JP 6031581 A JP6031581 A JP 6031581A JP 6031581 A JP6031581 A JP 6031581A JP S57181224 A JPS57181224 A JP S57181224A
Authority
JP
Japan
Prior art keywords
clock
output
down counter
polarity
generating 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.)
Granted
Application number
JP6031581A
Other languages
Japanese (ja)
Other versions
JPS6253087B2 (en
Inventor
Hideyuki Obara
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP6031581A priority Critical patent/JPS57181224A/en
Publication of JPS57181224A publication Critical patent/JPS57181224A/en
Publication of JPS6253087B2 publication Critical patent/JPS6253087B2/ja
Granted 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
    • H03M1/50—Analogue/digital converters with intermediate conversion to time interval
    • H03M1/56—Input signal compared with linear ramp

Landscapes

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

Abstract

PURPOSE:To equalize voltages applied to both terminals of a comparator by inputting a clock to an up/down counter on the basis of logical conditions of the polarity of the clock and the output of the comparator. CONSTITUTION:When the polarity of an output clock from a clock generating circuit 3 changes from a low to a high level, a clock from a clock generating circuit 2 is inputted to an up/down counter 4, which is driven once. A D/A converting circuit 5, once receiving the digital output of the up/down counter 4, raises an output voltage, step by step. If the polarity of the output clock of the clock generating circuit 3 changes from the high to the low level before the output voltage of the D/A converting circuit 5 reaches a prescribed level, the input to the up/down counter 4 is inhibited and the driving operation is stopped.
JP6031581A 1981-04-21 1981-04-21 Reference voltage setting circuit Granted JPS57181224A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6031581A JPS57181224A (en) 1981-04-21 1981-04-21 Reference voltage setting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6031581A JPS57181224A (en) 1981-04-21 1981-04-21 Reference voltage setting circuit

Publications (2)

Publication Number Publication Date
JPS57181224A true JPS57181224A (en) 1982-11-08
JPS6253087B2 JPS6253087B2 (en) 1987-11-09

Family

ID=13138613

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6031581A Granted JPS57181224A (en) 1981-04-21 1981-04-21 Reference voltage setting circuit

Country Status (1)

Country Link
JP (1) JPS57181224A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6340034U (en) * 1986-09-01 1988-03-15

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5143665A (en) * 1974-10-11 1976-04-14 Itt Anarogu deijitaruhenkakuki
JPS5546637A (en) * 1978-09-28 1980-04-01 Seiko Epson Corp Reference voltage circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5143665A (en) * 1974-10-11 1976-04-14 Itt Anarogu deijitaruhenkakuki
JPS5546637A (en) * 1978-09-28 1980-04-01 Seiko Epson Corp Reference voltage circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6340034U (en) * 1986-09-01 1988-03-15

Also Published As

Publication number Publication date
JPS6253087B2 (en) 1987-11-09

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