JPS5776918A - A/d converter - Google Patents

A/d converter

Info

Publication number
JPS5776918A
JPS5776918A JP15265080A JP15265080A JPS5776918A JP S5776918 A JPS5776918 A JP S5776918A JP 15265080 A JP15265080 A JP 15265080A JP 15265080 A JP15265080 A JP 15265080A JP S5776918 A JPS5776918 A JP S5776918A
Authority
JP
Japan
Prior art keywords
converter
operational amplifier
output signal
converted
detected temperature
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
JP15265080A
Other languages
Japanese (ja)
Inventor
Masahiko Takasaki
Kunio Mizukami
Katsutoshi Nishimura
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.)
Fujisoku Corp
Original Assignee
Fujisoku Electric Co Ltd
Fujisoku Corp
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 Fujisoku Electric Co Ltd, Fujisoku Corp filed Critical Fujisoku Electric Co Ltd
Priority to JP15265080A priority Critical patent/JPS5776918A/en
Publication of JPS5776918A publication Critical patent/JPS5776918A/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
    • H03M1/18—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging

Landscapes

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

Abstract

PURPOSE:To obtain a resolution bit number of more of an A/D converter, by switching an A/D conversion input through the provision of a level switching circuit. CONSTITUTION:An analog voltage corresponding to a detected temperature of a thermister 21 is outputted from an operational amplifier 26. This analog voltage is devided by variable resistors 28, 29 and respectively amplified by operational amplifiers 31, 39. At a low voltage region where the detected temperature is low, an output signal of the operational amplifier 31 is converted into a digital signal at an A/D converter 46. If the output digital value of the converter 46 exceeds a set value, a transistor 48 is conductive by an output signal from an operational amplifier 47, and an output signal of the amplifier 39 is converted into a digital signal by the A/D converter 46 in place of the operational amplifier 31.
JP15265080A 1980-10-30 1980-10-30 A/d converter Pending JPS5776918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15265080A JPS5776918A (en) 1980-10-30 1980-10-30 A/d converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15265080A JPS5776918A (en) 1980-10-30 1980-10-30 A/d converter

Publications (1)

Publication Number Publication Date
JPS5776918A true JPS5776918A (en) 1982-05-14

Family

ID=15545053

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15265080A Pending JPS5776918A (en) 1980-10-30 1980-10-30 A/d converter

Country Status (1)

Country Link
JP (1) JPS5776918A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62165518U (en) * 1986-04-10 1987-10-21
JPH06336071A (en) * 1993-05-27 1994-12-06 Canon Inc Image forming apparatus
EP2128988A1 (en) * 2008-05-28 2009-12-02 Moeller GmbH Switching assembly for controlling an entry of a microcontroller

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62165518U (en) * 1986-04-10 1987-10-21
JPH06336071A (en) * 1993-05-27 1994-12-06 Canon Inc Image forming apparatus
EP2128988A1 (en) * 2008-05-28 2009-12-02 Moeller GmbH Switching assembly for controlling an entry of a microcontroller

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