JPS5647741A - Decoupling device for nuclear magnetic resonating device - Google Patents

Decoupling device for nuclear magnetic resonating device

Info

Publication number
JPS5647741A
JPS5647741A JP12392279A JP12392279A JPS5647741A JP S5647741 A JPS5647741 A JP S5647741A JP 12392279 A JP12392279 A JP 12392279A JP 12392279 A JP12392279 A JP 12392279A JP S5647741 A JPS5647741 A JP S5647741A
Authority
JP
Japan
Prior art keywords
frequency
output
voltage
ratio
decoupling
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
JP12392279A
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 JP12392279A priority Critical patent/JPS5647741A/en
Publication of JPS5647741A publication Critical patent/JPS5647741A/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
    • G01R33/62—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using double resonance

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To make sufficient decoupling possible, by employing a phase lock looped circuit fo a decoupling device and also by making variable control of frequency division ratio of feedback frequency divider for this phase locked loop within a prescribed range. CONSTITUTION:Phases of an output of a frequency source 1 and an output of a programmable counter (PC) 7 are compared by a detector 2. This output is inputted to a charge pump 3, and a DC voltage is obtained in proportion to the phase difference. An output frequency of a voltage control oscillator (VCO) is varied in accordance with the DC voltage, and after having been amplified by an amplifier 5, it is applied from a radiation coil 6 to a specimen to be decoupled. At first, when the frequency ratio in N0 and the feedback loop is in a stable condition, a high frequency to be irradiated from an irradiating coil is fr.N0. And when the frequency ratio of PC 7 became N1 and the system is stabilized, the high frequency becomes f1.N1.
JP12392279A 1979-09-28 1979-09-28 Decoupling device for nuclear magnetic resonating device Pending JPS5647741A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12392279A JPS5647741A (en) 1979-09-28 1979-09-28 Decoupling device for nuclear magnetic resonating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12392279A JPS5647741A (en) 1979-09-28 1979-09-28 Decoupling device for nuclear magnetic resonating device

Publications (1)

Publication Number Publication Date
JPS5647741A true JPS5647741A (en) 1981-04-30

Family

ID=14872652

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12392279A Pending JPS5647741A (en) 1979-09-28 1979-09-28 Decoupling device for nuclear magnetic resonating device

Country Status (1)

Country Link
JP (1) JPS5647741A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10067046B2 (en) 2014-02-03 2018-09-04 A&D Company, Limited Containment workstation for hazardous fine particles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10067046B2 (en) 2014-02-03 2018-09-04 A&D Company, Limited Containment workstation for hazardous fine particles

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