JPS57119518A - Rough quantization error amplifier - Google Patents

Rough quantization error amplifier

Info

Publication number
JPS57119518A
JPS57119518A JP505481A JP505481A JPS57119518A JP S57119518 A JPS57119518 A JP S57119518A JP 505481 A JP505481 A JP 505481A JP 505481 A JP505481 A JP 505481A JP S57119518 A JPS57119518 A JP S57119518A
Authority
JP
Japan
Prior art keywords
gain
during
point
output
switching pulse
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
JP505481A
Other languages
Japanese (ja)
Other versions
JPH028494B2 (en
Inventor
Noboru Kawayauchi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP505481A priority Critical patent/JPS57119518A/en
Publication of JPS57119518A publication Critical patent/JPS57119518A/en
Publication of JPH028494B2 publication Critical patent/JPH028494B2/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
    • H03M1/14—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit
    • H03M1/16—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit with scale factor modification, i.e. by changing the amplification between the steps

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE:To enable a cascaded AD converter to perform high-speed, high-precision AD conversion by setting a gain low by a gain switching pulse during a period from an input point to an output point. CONSTITUTION:During a delay period from the input point of a sample holding analog signal to the output point of the DA-converted analog signal of the output signal of the 1st encoder 1 which encodes the high-order digit bits, an analog switch 8 is turned on by a gain switching pulse inputted from a terminal 10 to connect a resistance Rf2 to a feedback resistance Rf1 in parallel, thereby decreasing the gain of an amplifier 6. Therefore, the output signal is never in an overvoltage or overload state during the delay period, so a response speed is high and sufficient amplification is performed.
JP505481A 1981-01-19 1981-01-19 Rough quantization error amplifier Granted JPS57119518A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP505481A JPS57119518A (en) 1981-01-19 1981-01-19 Rough quantization error amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP505481A JPS57119518A (en) 1981-01-19 1981-01-19 Rough quantization error amplifier

Publications (2)

Publication Number Publication Date
JPS57119518A true JPS57119518A (en) 1982-07-26
JPH028494B2 JPH028494B2 (en) 1990-02-26

Family

ID=11600678

Family Applications (1)

Application Number Title Priority Date Filing Date
JP505481A Granted JPS57119518A (en) 1981-01-19 1981-01-19 Rough quantization error amplifier

Country Status (1)

Country Link
JP (1) JPS57119518A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51117862A (en) * 1975-04-10 1976-10-16 Nippon Hoso Kyokai <Nhk> Vertically connected a/d converter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51117862A (en) * 1975-04-10 1976-10-16 Nippon Hoso Kyokai <Nhk> Vertically connected a/d converter

Also Published As

Publication number Publication date
JPH028494B2 (en) 1990-02-26

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