JPS5745720A - Quantizing circuit - Google Patents

Quantizing circuit

Info

Publication number
JPS5745720A
JPS5745720A JP12113280A JP12113280A JPS5745720A JP S5745720 A JPS5745720 A JP S5745720A JP 12113280 A JP12113280 A JP 12113280A JP 12113280 A JP12113280 A JP 12113280A JP S5745720 A JPS5745720 A JP S5745720A
Authority
JP
Japan
Prior art keywords
converter
signal
gain
analog
amplifier
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
JP12113280A
Other languages
Japanese (ja)
Inventor
Michio Masuda
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 JP12113280A priority Critical patent/JPS5745720A/en
Publication of JPS5745720A publication Critical patent/JPS5745720A/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 prevent the increase in quantized noise at small signal input, by varying the gain of an amplifying means through a signal from an identification means and correcting the reciprocal of the variable amount into a quantizing signal, in a quantizing circuit for analog signals. CONSTITUTION:The level of an input signal (a) of an A/D converter 120 to quantize analog signals is detected at an over level detector 150 and an under level detector 170, the gain of an analog amplifier 110 is controlled with the amplitude to suppress it within a fixed range. At the same time, the gain of a D/A converter 140 is corrected by the amount changing the gain of the amplifier 110. Thus, the analog signal (a) before quantization is proportional to an analog signal k through the D/A converter 140 and the dynamic range of the A/D converter 120 can effectively be used. Thus, quantized noise can not be increased even with an A/D converter in less quantized bits.
JP12113280A 1980-09-03 1980-09-03 Quantizing circuit Pending JPS5745720A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12113280A JPS5745720A (en) 1980-09-03 1980-09-03 Quantizing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12113280A JPS5745720A (en) 1980-09-03 1980-09-03 Quantizing circuit

Publications (1)

Publication Number Publication Date
JPS5745720A true JPS5745720A (en) 1982-03-15

Family

ID=14803660

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12113280A Pending JPS5745720A (en) 1980-09-03 1980-09-03 Quantizing circuit

Country Status (1)

Country Link
JP (1) JPS5745720A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62195264U (en) * 1986-05-28 1987-12-11
JPS6359218A (en) * 1986-08-29 1988-03-15 Yokogawa Electric Corp Gain control circuit
JP2010500821A (en) * 2006-08-11 2010-01-07 エンテグリース，インコーポレイテッド Automatic ranging system and method for analog signals

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62195264U (en) * 1986-05-28 1987-12-11
JPS6359218A (en) * 1986-08-29 1988-03-15 Yokogawa Electric Corp Gain control circuit
JP2010500821A (en) * 2006-08-11 2010-01-07 エンテグリース，インコーポレイテッド Automatic ranging system and method for analog signals

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