JPS551760A - Analog-digital converter - Google Patents

Analog-digital converter

Info

Publication number
JPS551760A
JPS551760A JP7471378A JP7471378A JPS551760A JP S551760 A JPS551760 A JP S551760A JP 7471378 A JP7471378 A JP 7471378A JP 7471378 A JP7471378 A JP 7471378A JP S551760 A JPS551760 A JP S551760A
Authority
JP
Japan
Prior art keywords
voltage
switch
amplifier
output
circuit
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
JP7471378A
Other languages
Japanese (ja)
Other versions
JPS5815980B2 (en
Inventor
Yoshikatsu Sakai
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works 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 Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Hokushin Electric Corp
Priority to JP7471378A priority Critical patent/JPS5815980B2/en
Publication of JPS551760A publication Critical patent/JPS551760A/en
Publication of JPS5815980B2 publication Critical patent/JPS5815980B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE: To achieve A/D conversion with high speed and resolution, by connecting the CR series circuit to the feedback circuit of operational amplifier and selecting the amplitude of the constant current fed to input depending on the result of comparison between the amplifier output and the analog signal voltage.
CONSTITUTION: The switch S0 is closed with the instruction from the digital control circuit 4, the capacitor C is reset and the output Es is 0. The switch S1 is closed with instruction, the constant current i1 is fed to the operational amplifier OP1 and the capacitor C is charged, the voltage increasing with a slope corresponding to the amplitude of i1R1 and i1 is added at the output of ramp generation circuit 2 to cause the voltage Es. The voltage Es and the analog voltage E1 are compared 3, and when Es=E1, the output of the operational amplifier OP2 3 is inverted, and the circuit 4 is insynchronizing with the clock pulse CP to open the switch S1. If the point of E1=Es is at the middle of CP, since the switch S1 opens at the point P2, the voltage Es changes to Es1. The output of the amplifier OP2 is inverted with the points P1 and P2. Further, the switch S2 is closed with instruction, the constant current i2 is fed to the amplifier OP1, the capacitor C is again charged up, the voltage Es is increased with a slope corresponding to the current i2, and when it reaches Ei, the amplifier OP2 is inverted to turn off the switch S2.
COPYRIGHT: (C)1980,JPO&Japio
JP7471378A 1978-06-20 1978-06-20 analog to digital converter Expired JPS5815980B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7471378A JPS5815980B2 (en) 1978-06-20 1978-06-20 analog to digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7471378A JPS5815980B2 (en) 1978-06-20 1978-06-20 analog to digital converter

Publications (2)

Publication Number Publication Date
JPS551760A true JPS551760A (en) 1980-01-08
JPS5815980B2 JPS5815980B2 (en) 1983-03-29

Family

ID=13555128

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7471378A Expired JPS5815980B2 (en) 1978-06-20 1978-06-20 analog to digital converter

Country Status (1)

Country Link
JP (1) JPS5815980B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59132178U (en) * 1983-02-25 1984-09-04 日本アンテナ株式会社 feeder connection plug
JPS6251665U (en) * 1985-09-19 1987-03-31

Also Published As

Publication number Publication date
JPS5815980B2 (en) 1983-03-29

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