JPS5742858A - Driving circuit of signal meter - Google Patents

Driving circuit of signal meter

Info

Publication number
JPS5742858A
JPS5742858A JP11879480A JP11879480A JPS5742858A JP S5742858 A JPS5742858 A JP S5742858A JP 11879480 A JP11879480 A JP 11879480A JP 11879480 A JP11879480 A JP 11879480A JP S5742858 A JPS5742858 A JP S5742858A
Authority
JP
Japan
Prior art keywords
voltage
meter
signal
electric current
signal meter
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
JP11879480A
Other languages
Japanese (ja)
Inventor
Tatsumi Sumi
Shiro Mizutani
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP11879480A priority Critical patent/JPS5742858A/en
Publication of JPS5742858A publication Critical patent/JPS5742858A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/36—Overload-protection arrangements or circuits for electric measuring instruments

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE:To prevent the shake off and breakdown of meter, by connecting the resistance and clamper with the subsidiary electric current source turning on an electric current in proportion to the amplitude of input signal in parallel and constituting so as to fetch the output voltage from this connecting point. CONSTITUTION:A clamper 9 is added to the connecting point of an electric current source 1 subordinated to the intensity of input signal and its load resistance 8 in driving circuit of signal meter and driving voltage of a signal meter 4 is output by an emitter follower transistor 5. When an electric current I is increased by growing the input signal intense and an input voltage for the signal meter drive becomes a clamp voltage V4 or more, this input voltage is clamped at the voltage V4 by the clamper 9.By such a constitution, an excess current is not turned on the signal meter and shake off of pointer or breakdown of the meter, is prevented because of keeping drive saturated voltage of the signal meter constant.
JP11879480A 1980-08-27 1980-08-27 Driving circuit of signal meter Pending JPS5742858A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11879480A JPS5742858A (en) 1980-08-27 1980-08-27 Driving circuit of signal meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11879480A JPS5742858A (en) 1980-08-27 1980-08-27 Driving circuit of signal meter

Publications (1)

Publication Number Publication Date
JPS5742858A true JPS5742858A (en) 1982-03-10

Family

ID=14745265

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11879480A Pending JPS5742858A (en) 1980-08-27 1980-08-27 Driving circuit of signal meter

Country Status (1)

Country Link
JP (1) JPS5742858A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6514657B1 (en) 2000-07-19 2003-02-04 Kodak Polychrome Graphics, L.L.C. Photosensitive composition for lithographic printing plate and photosensitive lithographic printing plate
US6689539B2 (en) 2000-01-05 2004-02-10 Kodak Polychrome Graphics Llc Photosensitive composition and photosensitive lithographic printing plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6689539B2 (en) 2000-01-05 2004-02-10 Kodak Polychrome Graphics Llc Photosensitive composition and photosensitive lithographic printing plate
US6514657B1 (en) 2000-07-19 2003-02-04 Kodak Polychrome Graphics, L.L.C. Photosensitive composition for lithographic printing plate and photosensitive lithographic printing plate

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