JPS5758414A - Analog-to-digital conversion circuit providing agc function - Google Patents

Analog-to-digital conversion circuit providing agc function

Info

Publication number
JPS5758414A
JPS5758414A JP13333780A JP13333780A JPS5758414A JP S5758414 A JPS5758414 A JP S5758414A JP 13333780 A JP13333780 A JP 13333780A JP 13333780 A JP13333780 A JP 13333780A JP S5758414 A JPS5758414 A JP S5758414A
Authority
JP
Japan
Prior art keywords
converter
signal
conversion circuit
circuit providing
analog
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
JP13333780A
Other languages
Japanese (ja)
Inventor
Toshitaka Tsuda
Kazuo Murano
Shigeyuki Umigami
Noriaki Fujimura
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 JP13333780A priority Critical patent/JPS5758414A/en
Publication of JPS5758414A publication Critical patent/JPS5758414A/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 change the full scale, by detecting a peak value or average power of a digital output signal and controlling the reference signal of an A/D converter, in the A/D conversion circuit providing AGC function. CONSTITUTION:An input analog signal is inputted to an A/D converter 11 and converted into a digital signal. The output detects a peak or energy level at a circuit 12 and produces a digital signal corresponding to the level. This digital output is converted into ananalog signal at a D/A converter 13 and applied to the A/D converter 11 to make the operation of A/D conversion by taking it as the reference voltage. The A/D converter 11 is an A/D converter using a multiplying D/A converter, and since the multiplying D/A converter is used as a local decoder of A/D converter, the full scale of the A/D converter can be changed by changing the reference voltage.
JP13333780A 1980-09-25 1980-09-25 Analog-to-digital conversion circuit providing agc function Pending JPS5758414A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13333780A JPS5758414A (en) 1980-09-25 1980-09-25 Analog-to-digital conversion circuit providing agc function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13333780A JPS5758414A (en) 1980-09-25 1980-09-25 Analog-to-digital conversion circuit providing agc function

Publications (1)

Publication Number Publication Date
JPS5758414A true JPS5758414A (en) 1982-04-08

Family

ID=15102352

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13333780A Pending JPS5758414A (en) 1980-09-25 1980-09-25 Analog-to-digital conversion circuit providing agc function

Country Status (1)

Country Link
JP (1) JPS5758414A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5992621A (en) * 1982-11-19 1984-05-28 Ricoh Co Ltd Sampling method of analog signal
JPS61210721A (en) * 1985-03-15 1986-09-18 Canon Inc Analog digital converter circuit
JPS62172820A (en) * 1986-01-27 1987-07-29 Nippon Hoso Kyokai <Nhk> Automatic control system for signal level
JPS6359218A (en) * 1986-08-29 1988-03-15 Yokogawa Electric Corp Gain control circuit
JPS63136719A (en) * 1986-11-14 1988-06-08 フィリップス　エレクトロニクス　ネムローゼ　フェンノートシャップ Analog vs digital converter with automatic gain control circuit
JPS6464416A (en) * 1987-09-03 1989-03-10 Nec Corp A/d converting circuit
JPH0393313A (en) * 1989-09-05 1991-04-18 Nec Corp Level correction circuit
JP2001136036A (en) * 1999-11-09 2001-05-18 Denso Corp Sampling device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5321970A (en) * 1976-08-12 1978-02-28 Fuji Photo Film Co Ltd Pressure measuring sheet

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5321970A (en) * 1976-08-12 1978-02-28 Fuji Photo Film Co Ltd Pressure measuring sheet

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5992621A (en) * 1982-11-19 1984-05-28 Ricoh Co Ltd Sampling method of analog signal
JPS61210721A (en) * 1985-03-15 1986-09-18 Canon Inc Analog digital converter circuit
JPS62172820A (en) * 1986-01-27 1987-07-29 Nippon Hoso Kyokai <Nhk> Automatic control system for signal level
JPS6359218A (en) * 1986-08-29 1988-03-15 Yokogawa Electric Corp Gain control circuit
JPS63136719A (en) * 1986-11-14 1988-06-08 フィリップス　エレクトロニクス　ネムローゼ　フェンノートシャップ Analog vs digital converter with automatic gain control circuit
JPS6464416A (en) * 1987-09-03 1989-03-10 Nec Corp A/d converting circuit
JPH0393313A (en) * 1989-09-05 1991-04-18 Nec Corp Level correction circuit
JP2001136036A (en) * 1999-11-09 2001-05-18 Denso Corp Sampling device

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