JPS56151339A - Particle analyzer - Google Patents

Particle analyzer

Info

Publication number
JPS56151339A
JPS56151339A JP5599180A JP5599180A JPS56151339A JP S56151339 A JPS56151339 A JP S56151339A JP 5599180 A JP5599180 A JP 5599180A JP 5599180 A JP5599180 A JP 5599180A JP S56151339 A JPS56151339 A JP S56151339A
Authority
JP
Japan
Prior art keywords
amplifier
inputted
variable amplifier
sensibility
concentration
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
JP5599180A
Other languages
Japanese (ja)
Other versions
JPH0146816B2 (en
Inventor
Masayoshi Hayashi
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.)
Sysmex Corp
Original Assignee
Sysmex Corp
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 Sysmex Corp filed Critical Sysmex Corp
Priority to JP5599180A priority Critical patent/JPS56151339A/en
Publication of JPS56151339A publication Critical patent/JPS56151339A/en
Publication of JPH0146816B2 publication Critical patent/JPH0146816B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/10—Investigating individual particles
    • G01N15/1031—Investigating individual particles by measuring electrical or magnetic effects
    • G01N15/12—Investigating individual particles by measuring electrical or magnetic effects by observing changes in resistance or impedance across apertures when traversed by individual particles, e.g. by using the Coulter principle
    • G01N15/131—Details
    • G01N15/132—Circuits

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Abstract

PURPOSE:To enable automatic adjustment of sensitiveness irrespective of the concentration of a suspension, by a method wherein, an amplifying factor is controlled so that outputs of high-threshold and low-threshold circuits are set into a specified ratio in a Coulter counter. CONSTITUTION:A signal, detected based on a difference in impedance between a particle and liquid by means of a particle detector 1, is converted into a pulse signal and inputted to a variable amplifier 2. The output of the variable amplifier 2 is inputted to one side of a comparision amplifier 15 through a high level threshold circuit 10, a frequency-voltage converter 11, and a doubling amplifier 14, and is inputted to the other through a low level threshold circuit 12, and a frequency- voltage converter 13. The output of the comparison amplifier 15 adjusts a feedback resistance of the variable amplifier 2 using a servo-motor 16. This permits the automatic adjustment of the sensibility of the variable amplifier 2 even if the concentration of the suspension changes and the sensibility varies.
JP5599180A 1980-04-25 1980-04-25 Particle analyzer Granted JPS56151339A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5599180A JPS56151339A (en) 1980-04-25 1980-04-25 Particle analyzer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5599180A JPS56151339A (en) 1980-04-25 1980-04-25 Particle analyzer

Publications (2)

Publication Number Publication Date
JPS56151339A true JPS56151339A (en) 1981-11-24
JPH0146816B2 JPH0146816B2 (en) 1989-10-11

Family

ID=13014546

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5599180A Granted JPS56151339A (en) 1980-04-25 1980-04-25 Particle analyzer

Country Status (1)

Country Link
JP (1) JPS56151339A (en)

Also Published As

Publication number Publication date
JPH0146816B2 (en) 1989-10-11

Similar Documents

Publication Publication Date Title
JPS6417504A (en) High dynamics amplifier stage with strain detection function
ATE16428T1 (en) COIN CHECK.
ES8404535A1 (en) Smoke detector according to the radiation-extinction principle.
JPS56151339A (en) Particle analyzer
ES471838A1 (en) Method and circuit for producing measuring pulses in a particle analyzer
FR2385100A1 (en) Measuring signal noise suppression circuit - has non-linear transfer device with variable null zone in signal path
JPS56151341A (en) Particle analyzer
GB1523648A (en) Apparatus for determining a power function
GB1261735A (en) Feedback amplifier arrangements
JPS57181236A (en) Waveform amplification detecting system
JPS57100362A (en) Ultrasonic wave measuring device
JPS56151340A (en) Particle analyzer
SU542329A1 (en) Device for temporary automatic gain control
GB1284386A (en) Window trip monitor and comparator circuit
JPS57188163A (en) Signal discriminator
JPS6416080A (en) Noise reduction circuit
JPS5614709A (en) Agc circuit
JPS54161213A (en) Pulse noise detector
JPS5443448A (en) Compressor
JPS56148016A (en) Automatic gain controlling circuit for ultrasonic flowmeter
JPS57118411A (en) Automatic gain controller
JPS56157844A (en) Humidity detector
JPS6488179A (en) Wide-range neutron monitoring device
JPS6460012A (en) Amplifier
JPS56154858A (en) Amplitude detector for binary amplitude-modulated wave