JPS5633566A - Direct viewing device for characteristic of voltage variable capacity diode - Google Patents
Direct viewing device for characteristic of voltage variable capacity diodeInfo
- Publication number
- JPS5633566A JPS5633566A JP10857179A JP10857179A JPS5633566A JP S5633566 A JPS5633566 A JP S5633566A JP 10857179 A JP10857179 A JP 10857179A JP 10857179 A JP10857179 A JP 10857179A JP S5633566 A JPS5633566 A JP S5633566A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- characteristic
- diode
- variable capacity
- output
- 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
Links
Landscapes
- Testing Of Individual Semiconductor Devices (AREA)
Abstract
PURPOSE: To enable the direct viewing of an electrostatic capacity-voltage characteristic of a voltage variable capacity diode by a method wherein triangle waves with offset voltage at the positive voltage side are oscillated, and the waves are utilized as bias voltage and voltage for measuring electrostatic capacity.
CONSTITUTION: Output from an oscillator TG putting out triangle waves with offset voltage at the positive voltage side and the voltage of a voltage variable capacity diode VC as a sample to be measured are inputted to an error amplifier A1, and the output is provided to an amplifier A2, at which a frequency characteristic of a loop is adjusted, and applied to the diode VC as bias voltage through a resistor R1. Voltage generated at the resistor R1 is supplied to a vertical axis of an oscilloscope CRT and output from the oscillator TG to a horizontal axis. Thus, the triangle wave voltage can be used in common for bias voltage, voltage for measuring electrostatic capacity and the drive of the oscilloscope, and a characteristic of the diode can accurately be measured a short time.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10857179A JPS5633566A (en) | 1979-08-28 | 1979-08-28 | Direct viewing device for characteristic of voltage variable capacity diode |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10857179A JPS5633566A (en) | 1979-08-28 | 1979-08-28 | Direct viewing device for characteristic of voltage variable capacity diode |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5633566A true JPS5633566A (en) | 1981-04-04 |
JPS6148673B2 JPS6148673B2 (en) | 1986-10-25 |
Family
ID=14488183
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10857179A Granted JPS5633566A (en) | 1979-08-28 | 1979-08-28 | Direct viewing device for characteristic of voltage variable capacity diode |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5633566A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4739252A (en) * | 1986-04-24 | 1988-04-19 | International Business Machines Corporation | Current attenuator useful in a very low leakage current measuring device |
-
1979
- 1979-08-28 JP JP10857179A patent/JPS5633566A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4739252A (en) * | 1986-04-24 | 1988-04-19 | International Business Machines Corporation | Current attenuator useful in a very low leakage current measuring device |
Also Published As
Publication number | Publication date |
---|---|
JPS6148673B2 (en) | 1986-10-25 |
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