JPH02144775U - - Google Patents
Info
- Publication number
- JPH02144775U JPH02144775U JP5300989U JP5300989U JPH02144775U JP H02144775 U JPH02144775 U JP H02144775U JP 5300989 U JP5300989 U JP 5300989U JP 5300989 U JP5300989 U JP 5300989U JP H02144775 U JPH02144775 U JP H02144775U
- Authority
- JP
- Japan
- Prior art keywords
- reference value
- filter
- output waveform
- digital tester
- peak value
- 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
- 230000010355 oscillation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Description
第１図は本考案の実施例を示す回路図、第２図
ａ，ｂ、第３図及び第４図ａ，ｂは、それぞれ本
考案の作動説明をするための波形図である。
図中、Ｖｉｎ……入力電圧、ＨＦ……ハイパス
フイルター、ＣＰ１，ＣＰ２……コンパレーター
、ＳＷ１ａ，ＳＷ２ａ……切替スイツチ、Ｄ１，
Ｄ２……発光ダイオードである。
FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIGS. 2a, b, 3, and 4 a, b are waveform diagrams for explaining the operation of the present invention, respectively. In the figure, Vin...input voltage, HF...high pass filter, CP1, CP2...comparator, SW1a, SW2a...changeover switch, D1,
D2... is a light emitting diode.
Claims (1)
ジタルテスターであつて、入力電圧の交流分を分
離するためのフイルターと、該フイルターの出力
波形の波高値を基準値と比較するためのコンパレ
ーターと、出力波形の波高値が基準値を超えたと
きに点滅する発行手段と、前記基準値を複数段階
に切り替えるためのスイツチとから構成されるデ
ジタルテスター。 A digital tester capable of detecting oscillation waves of a circuit under test, which includes a filter to separate the alternating current component of the input voltage, and a comparator to compare the peak value of the output waveform of the filter with a reference value. A digital tester comprising an issuing means that blinks when the peak value of the output waveform exceeds a reference value, and a switch for switching the reference value to a plurality of levels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5300989U JPH02144775U (en) | 1989-05-10 | 1989-05-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5300989U JPH02144775U (en) | 1989-05-10 | 1989-05-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02144775U true JPH02144775U (en) | 1990-12-07 |
Family
ID=31573817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5300989U Pending JPH02144775U (en) | 1989-05-10 | 1989-05-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02144775U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04233471A (en) * | 1990-11-23 | 1992-08-21 | John Fluke Mfg Co Inc | Digital multimeter and automatic function selecting method |
| JP2020186969A (en) * | 2019-05-13 | 2020-11-19 | ローム株式会社 | Oscillation detection circuit |
-
1989
- 1989-05-10 JP JP5300989U patent/JPH02144775U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04233471A (en) * | 1990-11-23 | 1992-08-21 | John Fluke Mfg Co Inc | Digital multimeter and automatic function selecting method |
| JP2020186969A (en) * | 2019-05-13 | 2020-11-19 | ローム株式会社 | Oscillation detection circuit |