JPS5451762A - Modulation-type dc amplifier - Google Patents

Modulation-type dc amplifier

Info

Publication number
JPS5451762A
JPS5451762A JP11834977A JP11834977A JPS5451762A JP S5451762 A JPS5451762 A JP S5451762A JP 11834977 A JP11834977 A JP 11834977A JP 11834977 A JP11834977 A JP 11834977A JP S5451762 A JPS5451762 A JP S5451762A
Authority
JP
Japan
Prior art keywords
amplifier
frequency
type
modulation
chopper
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
JP11834977A
Other languages
Japanese (ja)
Other versions
JPS583410B2 (en
Inventor
Toru Shimazaki
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 JP52118349A priority Critical patent/JPS583410B2/en
Publication of JPS5451762A publication Critical patent/JPS5451762A/en
Publication of JPS583410B2 publication Critical patent/JPS583410B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/38—DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To obtain a high-accuracy modulation-type DC amplifier featuring an extremely small offset by securing a special relation for the driving frequency of the first chopper against the noise of the frequency put on the input signal line. CONSTITUTION:The modulation-type DC amplifier contains the following component units: first chopper CH1 which receives supply of the DC input signal and is driven at frequency f1; second chopper CH2 which is connected to the next step of CH1 and driven at frequency f2; AC amplifier A which amplifies the output signal of CH2; synchronous rectifier circuit SR which operates synchronizing with the output signal plus the driving signals of the first and second choppers; and smoothing circuit SC which smoothes the output signal. In this DC amplifier, f1=fn/(2N- 1), where N is a positive integer, is set for driving frequency f1 of CH1 against the noise of frequency fn put on the input signal line. In this way, a high-accuracy modulation-type DC amplifier can be obtained with an extremely small offset.
JP52118349A 1977-09-30 1977-09-30 Modulating DC amplifier Expired JPS583410B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52118349A JPS583410B2 (en) 1977-09-30 1977-09-30 Modulating DC amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52118349A JPS583410B2 (en) 1977-09-30 1977-09-30 Modulating DC amplifier

Publications (2)

Publication Number Publication Date
JPS5451762A true JPS5451762A (en) 1979-04-23
JPS583410B2 JPS583410B2 (en) 1983-01-21

Family

ID=14734488

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52118349A Expired JPS583410B2 (en) 1977-09-30 1977-09-30 Modulating DC amplifier

Country Status (1)

Country Link
JP (1) JPS583410B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59148413A (en) * 1983-02-14 1984-08-25 Hitachi Ltd preamplifier
WO2019099604A1 (en) * 2017-11-15 2019-05-23 Microchip Technology Incorporated Power-on-reset and phase comparator for chopper amplifiers

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03289428A (en) * 1990-03-16 1991-12-19 Sumi Yoshito Packaging method for cleaned product and packaging jig therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59148413A (en) * 1983-02-14 1984-08-25 Hitachi Ltd preamplifier
WO2019099604A1 (en) * 2017-11-15 2019-05-23 Microchip Technology Incorporated Power-on-reset and phase comparator for chopper amplifiers
US10727794B2 (en) 2017-11-15 2020-07-28 Microchip Technology Incorporated Power-on-reset and phase comparator for chopper amplifiers

Also Published As

Publication number Publication date
JPS583410B2 (en) 1983-01-21

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