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JPS56131227A - Negative feedback circuit for reference voltage of da converter - Google Patents

Negative feedback circuit for reference voltage of da converter

Info

Publication number
JPS56131227A
JPS56131227A JP3387080A JP3387080A JPS56131227A JP S56131227 A JPS56131227 A JP S56131227A JP 3387080 A JP3387080 A JP 3387080A JP 3387080 A JP3387080 A JP 3387080A JP S56131227 A JPS56131227 A JP S56131227A
Authority
JP
Japan
Prior art keywords
amplifier
output
feedback circuit
negative feedback
diode
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
JP3387080A
Other languages
Japanese (ja)
Inventor
Tsutomu Noda
Isao Akitake
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3387080A priority Critical patent/JPS56131227A/en
Publication of JPS56131227A publication Critical patent/JPS56131227A/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
    • H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters

Landscapes

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

Abstract

PURPOSE:To prevent transistors in a negative feedback circuit from being saturated, by inhibiting the output signal of an amplifier from rising or falling unnecessarily by connecting the output of the amplifier to a bias voltage source via diode. CONSTITUTION:The output of amplifier 1 is connected to the bias power source via diode 23 and bias terminal 24. If the output of amplifier 1 reaches a voltage high enought to saturate transistor Tr2, diode 23 turns on and the output of the amplifier never rises above a constant voltage. Thus, the saturation of Tr2 is prevented and Tr2 and the amplifier constitute a negative feedback circuit, so that when the output of amplifier 1 falls in a normal state, diode 23 turns off. Namely, diode 23 turns on only when Tr2 is almost saturated in electric power feed, etc., and turns off when the negative feedback circuit is in normal operation with the power source stable.
JP3387080A 1980-03-19 1980-03-19 Negative feedback circuit for reference voltage of da converter Pending JPS56131227A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3387080A JPS56131227A (en) 1980-03-19 1980-03-19 Negative feedback circuit for reference voltage of da converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3387080A JPS56131227A (en) 1980-03-19 1980-03-19 Negative feedback circuit for reference voltage of da converter

Publications (1)

Publication Number Publication Date
JPS56131227A true JPS56131227A (en) 1981-10-14

Family

ID=12398540

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3387080A Pending JPS56131227A (en) 1980-03-19 1980-03-19 Negative feedback circuit for reference voltage of da converter

Country Status (1)

Country Link
JP (1) JPS56131227A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6223626A (en) * 1985-07-24 1987-01-31 Hitachi Micro Comput Eng Ltd Semiconductor integrated circuit device
JPS63215224A (en) * 1987-03-04 1988-09-07 Toshiba Corp Digital/analog converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6223626A (en) * 1985-07-24 1987-01-31 Hitachi Micro Comput Eng Ltd Semiconductor integrated circuit device
JPS63215224A (en) * 1987-03-04 1988-09-07 Toshiba Corp Digital/analog converter

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