JPS5593070A - Frequency decision circuit - Google Patents
Frequency decision circuitInfo
- Publication number
- JPS5593070A JPS5593070A JP15379A JP15379A JPS5593070A JP S5593070 A JPS5593070 A JP S5593070A JP 15379 A JP15379 A JP 15379A JP 15379 A JP15379 A JP 15379A JP S5593070 A JPS5593070 A JP S5593070A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- frequency
- terminal
- output
- level
- 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
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
PURPOSE: To simplify a discrimination between the kinds of input signals by a simple circuit constitution by detecting whether an input frequency is high or low, by detecting a phase difference between an input signal frequency and reference comparison frequency.
CONSTITUTION: A signal of frequency f1 is applied to signal input terminal 8, and a reference frequency signal of fr1 to terminal 13 to obtain alternating signal A at output part 17 of phase discrimination circuit 9. Output signal A is integrated by LPF1 and converted into a DC level to output a "H"-level signal to terminal 15. On the other hand, frequency signal f1 and reference frequency fr2 from terminal 14 are inputted to phase discrimination circuit 10 to output alternating signal F to output part 18. This output signal F is integrated by LPF12 and a "H"-level signal is outputted to terminal 16. Namely, when f1>fr1>fr2, terminals 15 and 16 are held at level "H" and when fr1>f2>fr2, terminals 15 and 16 are at "L" and "H"; and when fr1>fr2>f3, terminals 15 and 16 are both at "L".
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15379A JPS5593070A (en) | 1979-01-08 | 1979-01-08 | Frequency decision circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15379A JPS5593070A (en) | 1979-01-08 | 1979-01-08 | Frequency decision circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5593070A true JPS5593070A (en) | 1980-07-15 |
Family
ID=11466089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15379A Pending JPS5593070A (en) | 1979-01-08 | 1979-01-08 | Frequency decision circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5593070A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4507542A (en) * | 1982-05-07 | 1985-03-26 | Kohlensaeurewerk GmbH | Impulse welding device for gas shielded arc welding |
JP2016109514A (en) * | 2014-12-04 | 2016-06-20 | 日置電機株式会社 | Measurement device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51106470A (en) * | 1975-03-17 | 1976-09-21 | Hitachi Ltd |
-
1979
- 1979-01-08 JP JP15379A patent/JPS5593070A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51106470A (en) * | 1975-03-17 | 1976-09-21 | Hitachi Ltd |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4507542A (en) * | 1982-05-07 | 1985-03-26 | Kohlensaeurewerk GmbH | Impulse welding device for gas shielded arc welding |
JP2016109514A (en) * | 2014-12-04 | 2016-06-20 | 日置電機株式会社 | Measurement device |
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