JPS5694275A - Frequency detector - Google Patents
Frequency detectorInfo
- Publication number
- JPS5694275A JPS5694275A JP17095679A JP17095679A JPS5694275A JP S5694275 A JPS5694275 A JP S5694275A JP 17095679 A JP17095679 A JP 17095679A JP 17095679 A JP17095679 A JP 17095679A JP S5694275 A JPS5694275 A JP S5694275A
- Authority
- JP
- Japan
- Prior art keywords
- output
- high accuracy
- frequency
- voltage
- oscillator
- 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 perform detection of high accuracy with simple constitution by multiplying the oscillator output of high accuracy and the voltage to be measured, and inputting the output thereof to a frequency/voltage converter via a filter.
CONSTITUTION: The output of an oscillator 1 of high accuracy to become a reference, for example, a crystal oscillator, and the voltage 2 to be measured are multiplied by a multiplier 3. The output of the multiplier 3 is applied via a filter 4 which permits the passage of the frequency difference of both, to a frequency/voltage converter 5, by which the frequency difference is converted to an analog signal, and the result thereof is obtained in an output 6.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17095679A JPS5694275A (en) | 1979-12-28 | 1979-12-28 | Frequency detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17095679A JPS5694275A (en) | 1979-12-28 | 1979-12-28 | Frequency detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5694275A true JPS5694275A (en) | 1981-07-30 |
Family
ID=15914488
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17095679A Pending JPS5694275A (en) | 1979-12-28 | 1979-12-28 | Frequency detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5694275A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04285864A (en) * | 1991-03-14 | 1992-10-09 | Nec Corp | Frequency measuring apparatus |
-
1979
- 1979-12-28 JP JP17095679A patent/JPS5694275A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04285864A (en) * | 1991-03-14 | 1992-10-09 | Nec Corp | Frequency measuring apparatus |
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