JPS56155862A - Frequency measuring method - Google Patents
Frequency measuring methodInfo
- Publication number
- JPS56155862A JPS56155862A JP6027080A JP6027080A JPS56155862A JP S56155862 A JPS56155862 A JP S56155862A JP 6027080 A JP6027080 A JP 6027080A JP 6027080 A JP6027080 A JP 6027080A JP S56155862 A JPS56155862 A JP S56155862A
- Authority
- JP
- Japan
- Prior art keywords
- wave signal
- sine wave
- amplitude
- circuit
- operator
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
PURPOSE:To make measurement of frequencies possible without receiving the in fluence of noise and amplitude change by calculating the time when an input sine wave signal zero-crosses by using a circuit analysis method and taking the inverse number of the period thereof. CONSTITUTION:A sample holding circuit 1 sample-holds the amplitude analog value at each point of time of an input sine wave signal according to the sampling pulses outputted from a timing circuit 4 based on clock pulses and applies the value thereof as amplitude information to an operator 3. A counter 2 calculates time data by counting the clock pulses and applies this to the operator 3. Based on these data, the operator 3 makes circuit analysis, thereby determining the period of the sine wave signal. The period determined by this is taken of reciprocal by the circuit of the subsequent stage, whereby the frequency of the sine wave signal is determined. Thereby, the highly accurate frequency measurement is accomplished without being affected by noise and the change of amplitude.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6027080A JPS56155862A (en) | 1980-05-07 | 1980-05-07 | Frequency measuring method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6027080A JPS56155862A (en) | 1980-05-07 | 1980-05-07 | Frequency measuring method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56155862A true JPS56155862A (en) | 1981-12-02 |
Family
ID=13137271
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6027080A Pending JPS56155862A (en) | 1980-05-07 | 1980-05-07 | Frequency measuring method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56155862A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004271538A (en) * | 1997-09-30 | 2004-09-30 | Mitsubishi Electric Corp | Electronic circuit inspection device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4948149A (en) * | 1972-09-11 | 1974-05-10 |
-
1980
- 1980-05-07 JP JP6027080A patent/JPS56155862A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4948149A (en) * | 1972-09-11 | 1974-05-10 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004271538A (en) * | 1997-09-30 | 2004-09-30 | Mitsubishi Electric Corp | Electronic circuit inspection device |
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