JPS59162666U - Reciprocal calculation type frequency measuring instrument - Google Patents
Reciprocal calculation type frequency measuring instrumentInfo
- Publication number
- JPS59162666U JPS59162666U JP3659084U JP3659084U JPS59162666U JP S59162666 U JPS59162666 U JP S59162666U JP 3659084 U JP3659084 U JP 3659084U JP 3659084 U JP3659084 U JP 3659084U JP S59162666 U JPS59162666 U JP S59162666U
- Authority
- JP
- Japan
- Prior art keywords
- under test
- signal under
- counter
- measuring instrument
- circuit
- 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
Landscapes
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図はこの考案にかかる逆数演算型周波数測定器の回
路図、第２図は各信号のパルス波形図である。
図中、参照符号３は制御回路、４．１１はゲート回路、
５，１２はカウンタ回路、６は演算回路、 −９
は表示装置、１０はクロックパルス発生器である。FIG. 1 is a circuit diagram of a reciprocal calculation type frequency measuring device according to this invention, and FIG. 2 is a pulse waveform diagram of each signal. In the figure, reference numeral 3 is a control circuit, 4.11 is a gate circuit,
5 and 12 are counter circuits, 6 is an arithmetic circuit, -9
1 is a display device, and 10 is a clock pulse generator.
Claims (1)
波数を算出する逆数演算型周波数測定器であって、波形
整形された前記被測定信号のパルスを計数する第１のカ
ウンタ回路と、基準クロックパルスを発生するクロック
パルス発生器と、該パルス発生器からのクロックパルス
を計数する第。 ２のカウンタ回路と、予め設定された時間動作するタイ
マと、前記被測定信号の所定のレベル変化を検出して前
記第１、第２のカウンタ回路および前記タイマを動作さ
せ、前記第１、第２のカウンタ回路にて前記被測定信号
パルスおよび前記クロックパルスの計数をそれぞれ開始
させ、前記タイマの所定時間経過後に前記被測定信号の
前記レベル変化と同一状態のレベル変化を検出して前記
第１および第２のカウンタ回路の計数動作を停止させる
制御回路とを備えているものにおいて、前記第１のカウ
ンタから出力される前記被測定信号のパルス計数値ｒと
、前記クロックパルスの周波値Ｆと、前記第２のカウン
タから供給されるクロックパルス計数値ｆとにより、（
Ｆｘｒ）／ｆなる演算を行なう演算回路を有し、該演算
回路の出力をデジタル表示器にて表示させることを特徴
とする逆数演算型周波数測定器。[Claims for Utility Model Registration] A reciprocal calculation type frequency measuring instrument that calculates the frequency of the signal under test by determining the period of the signal under test and its reciprocal, and counts the pulses of the signal under test whose waveform has been shaped. a first counter circuit, a clock pulse generator for generating reference clock pulses, and a first counter circuit for counting clock pulses from the pulse generator. 2 counter circuits, a timer that operates for a preset time; detecting a predetermined level change of the signal under test and operating the first and second counter circuits and the timer; The second counter circuit starts counting the signal under test pulse and the clock pulse, and after a predetermined time of the timer has elapsed, a level change in the same state as the level change of the signal under test is detected. and a control circuit for stopping the counting operation of the second counter circuit, wherein the pulse count value r of the signal under test output from the first counter and the frequency value F of the clock pulse are , the clock pulse count value f supplied from the second counter, (
1. A reciprocal calculation type frequency measuring instrument characterized by having an arithmetic circuit that performs the calculation Fxr)/f, and displaying the output of the arithmetic circuit on a digital display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3659084U JPS59162666U (en) | 1984-03-14 | 1984-03-14 | Reciprocal calculation type frequency measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3659084U JPS59162666U (en) | 1984-03-14 | 1984-03-14 | Reciprocal calculation type frequency measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59162666U true JPS59162666U (en) | 1984-10-31 |
Family
ID=30167260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3659084U Pending JPS59162666U (en) | 1984-03-14 | 1984-03-14 | Reciprocal calculation type frequency measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59162666U (en) |
-
1984
- 1984-03-14 JP JP3659084U patent/JPS59162666U/en active Pending
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