JPS576346A - Nmr lock circuit - Google Patents

Nmr lock circuit

Info

Publication number
JPS576346A
JPS576346A JP7898880A JP7898880A JPS576346A JP S576346 A JPS576346 A JP S576346A JP 7898880 A JP7898880 A JP 7898880A JP 7898880 A JP7898880 A JP 7898880A JP S576346 A JPS576346 A JP S576346A
Authority
JP
Japan
Prior art keywords
output
signal
amplifier
lock
frequency oscillator
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
JP7898880A
Other languages
Japanese (ja)
Inventor
Hiroshi Yokogawa
Munetaka Tsuda
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 JP7898880A priority Critical patent/JPS576346A/en
Publication of JPS576346A publication Critical patent/JPS576346A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/389—Field stabilisation, e.g. by field measurements and control means or indirectly by current stabilisation

Abstract

PURPOSE:To remove the DC offset components appearing in detection output by changing the output of a modulating frequency oscillator to a suitable amplitude through phase controlling, adding the same to a lock AF signal and adding the signal to an AF detecting circuit. CONSTITUTION:The output of a high-frequency oscillator 1 for lock signal is pulse- modulated in a modulator 3 by the output of a modulating frequency oscillator 2, and is irradiated to the sample 6 placed in a magnet 7 by way of a power amplifier 4 and a coil 5. On the other hand, the output of the oscillator 2 is phase-shifted by a phase controller 18, is inputted to an adding amplifier 21 by a tuning amplifier 19 and an attenuator 20, thence it is added to the lock AF signal from an RF amplifier 8. This added output is detected by an AF detector 9, and is applied to a back- out coil 11 via a integrator 10, by which it is corrected of magnetic field fluctuating components. Thereby, the leakage components from the pulse irradiation output producing DC offset components are removed.
JP7898880A 1980-06-13 1980-06-13 Nmr lock circuit Pending JPS576346A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7898880A JPS576346A (en) 1980-06-13 1980-06-13 Nmr lock circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7898880A JPS576346A (en) 1980-06-13 1980-06-13 Nmr lock circuit

Publications (1)

Publication Number Publication Date
JPS576346A true JPS576346A (en) 1982-01-13

Family

ID=13677269

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7898880A Pending JPS576346A (en) 1980-06-13 1980-06-13 Nmr lock circuit

Country Status (1)

Country Link
JP (1) JPS576346A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6158472A (en) * 1984-08-30 1986-03-25 Denki Onkyo Co Ltd High voltage generator
JPH01286577A (en) * 1988-03-25 1989-11-17 Rca Licensing Corp Television receiver electric source

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6158472A (en) * 1984-08-30 1986-03-25 Denki Onkyo Co Ltd High voltage generator
JPH01286577A (en) * 1988-03-25 1989-11-17 Rca Licensing Corp Television receiver electric source

Similar Documents

Publication Publication Date Title
GB1256188A (en) Generator for producing ultrasonic oscillations
US3358222A (en) Gyromagnetic resonance apparatus utilizing pulsed rf excitation
KR930013694A (en) Electronic Spin Resonance Device
GB1488584A (en) Impulse response magnetic resonance spectrometer
JPS576346A (en) Nmr lock circuit
JPH0587248B2 (en)
GB875867A (en) High frequency measuring apparatus
JPS56154860A (en) Detection system for frequency difference signal
JPS612047A (en) Nuclear magnetic resonator device
SU750354A1 (en) Method of investigating electron paramagnetic resonance saturation line
SU1068800A1 (en) Two-frequency flaw detector (its versions)
SU693226A1 (en) Electron-paramagnetic analyzer of composition
SU1113759A1 (en) Device for processing pulse radio signals
SU1483465A1 (en) Harmonic signal shaper
JPH0527832B2 (en)
JPS63214249A (en) Power source apparatus for nuclear magnetic resonance imaging apparatus
SU1627946A1 (en) Electronic paramagnetic resonance radio spectrometer
SU492796A1 (en) Structuroscope
SU1666124A1 (en) Device for irradiating biological objects with electric and magnetic fields
JPS5468693A (en) Electronic spin resonator
SU1264117A1 (en) Device for measuring magnetic flux density of pulsed field
SU823990A1 (en) Electron paramagnetic composition analyzer
RU1800377C (en) Method of frequency-selected measuring peak value of power of microwave signal
SU1390785A1 (en) Device for automatic tuning of oscillatory circuit
GB985208A (en) Gyromagnetic resonance method and apparatus