JPS5625825A - Analog-digital conversion circuit - Google Patents

Analog-digital conversion circuit

Info

Publication number
JPS5625825A
JPS5625825A JP10191579A JP10191579A JPS5625825A JP S5625825 A JPS5625825 A JP S5625825A JP 10191579 A JP10191579 A JP 10191579A JP 10191579 A JP10191579 A JP 10191579A JP S5625825 A JPS5625825 A JP S5625825A
Authority
JP
Japan
Prior art keywords
output
signal
conversion
analog signal
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
JP10191579A
Other languages
Japanese (ja)
Inventor
Miharu Nagatomi
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP10191579A priority Critical patent/JPS5625825A/en
Publication of JPS5625825A publication Critical patent/JPS5625825A/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

Abstract

PURPOSE:To give margin the A-D conversion time, by holding the analog signal again after polarity switching or level shift. CONSTITUTION:The input analog signal always converted into positive with the polarity switching means 8 is input to the DC level shift means 13 and fed to the 2nd sample hold circuit 20 from the operational amplifier 15. In response to the switcing start signal C-C produced with a slight delay than the trailing of the sample hold pulse Ps, the A-D conversion with the A-D converter 19 is started and the digital signal is output from the A-D conversion 19. The addition of this output to the Q output of the D-FFs 12, 17 (output indicating the polarity and range of signal) is the digital signal corresponding to the input analog signal.
JP10191579A 1979-08-09 1979-08-09 Analog-digital conversion circuit Pending JPS5625825A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10191579A JPS5625825A (en) 1979-08-09 1979-08-09 Analog-digital conversion circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10191579A JPS5625825A (en) 1979-08-09 1979-08-09 Analog-digital conversion circuit

Publications (1)

Publication Number Publication Date
JPS5625825A true JPS5625825A (en) 1981-03-12

Family

ID=14313197

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10191579A Pending JPS5625825A (en) 1979-08-09 1979-08-09 Analog-digital conversion circuit

Country Status (1)

Country Link
JP (1) JPS5625825A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5873231A (en) * 1981-10-27 1983-05-02 Shimadzu Corp Analog-to-digital converter
JPS5994439U (en) * 1982-12-15 1984-06-27 株式会社島津製作所 AD conversion device
JPH01155720A (en) * 1987-12-12 1989-06-19 Chino Corp A/d converter
EP1648089A1 (en) * 2004-10-13 2006-04-19 Cirrus Logic, Inc. Method and apparatus to improve adc dynamic range in a video decoder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5873231A (en) * 1981-10-27 1983-05-02 Shimadzu Corp Analog-to-digital converter
JPS5994439U (en) * 1982-12-15 1984-06-27 株式会社島津製作所 AD conversion device
JPH01155720A (en) * 1987-12-12 1989-06-19 Chino Corp A/d converter
EP1648089A1 (en) * 2004-10-13 2006-04-19 Cirrus Logic, Inc. Method and apparatus to improve adc dynamic range in a video decoder

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