JPS5585266A - Measuring device for dc amplification factor - Google Patents
Measuring device for dc amplification factorInfo
- Publication number
- JPS5585266A JPS5585266A JP16556378A JP16556378A JPS5585266A JP S5585266 A JPS5585266 A JP S5585266A JP 16556378 A JP16556378 A JP 16556378A JP 16556378 A JP16556378 A JP 16556378A JP S5585266 A JPS5585266 A JP S5585266A
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- collector
- resistor
- amplification factor
- current
- 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
Links
Abstract
PURPOSE: To make it possible to easily measure the DC amplification factor of with respect to a collector current with a transistor by supplying a base current corresponding to a program voltage produced as output by an arithmetic amplifier to the transistor to be tested.
CONSTITUTION: A collector power source 2 and a collector current detection resistor 4 are connected in series to the collector 1 to be tested. An operational amplifier 5 produces as output a program voltage corresponding to the voltage generated at both ends of a resistor 5 by using the voltage generated between both ends of the resistor 3 as (+) input and the reference voltage from a reference power source 4 as (-) input. A programable current source 6 supplies a base current in correspondence to the program voltage to the transistor 1. The hPE of the transistor 1 is indicated by a voltmeter 7.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16556378A JPS5585266A (en) | 1978-12-21 | 1978-12-21 | Measuring device for dc amplification factor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16556378A JPS5585266A (en) | 1978-12-21 | 1978-12-21 | Measuring device for dc amplification factor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5585266A true JPS5585266A (en) | 1980-06-27 |
Family
ID=15814731
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16556378A Pending JPS5585266A (en) | 1978-12-21 | 1978-12-21 | Measuring device for dc amplification factor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5585266A (en) |
-
1978
- 1978-12-21 JP JP16556378A patent/JPS5585266A/en active Pending
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