JPS6080357U - frequency detection circuit - Google Patents
frequency detection circuitInfo
- Publication number
- JPS6080357U JPS6080357U JP16976783U JP16976783U JPS6080357U JP S6080357 U JPS6080357 U JP S6080357U JP 16976783 U JP16976783 U JP 16976783U JP 16976783 U JP16976783 U JP 16976783U JP S6080357 U JPS6080357 U JP S6080357U
- Authority
- JP
- Japan
- Prior art keywords
- voltages
- detection circuit
- frequency detection
- switches
- rectangular wave
- 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)
- Measurement Of Current Or Voltage (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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は複数の絶縁された周波数信号を得る従来の周波
数検出回路の回路図であり、第２図は周波数が低いとき
の周波数検出回路動作波形図であり、第３図は周波数が
高いときの周波数検出回路動作波形図である。第４図は
本考案の実施例を示す回路図であり、第５図は本考案の
第２の実施例を示す回路図である。
１・・・・・・入力端子、２・・・・・・入力変成器、
３・・・・・・波形整形器、４・・・・・・パルス発生
器、５，１５・・・・・・開閉接点、６，１６，２６・
・・・・・基準電圧発生器、？、１７．２７・・・・・
・ベース駆動回路、８．１８゜２８・・・・・・トラン
ジスタ、９．１９，２９・・・・・・直流増幅器、１０
．２０．３０・・・・・・出力端子、１１・・・・・・
電圧・周波数変換器、１２・・・・・・絶縁変圧器、１
３・・・・・・周波数・電圧変換器、１７Ｐ、２７Ｐ・
曲・ホトカプラ。
第２図
第３図Figure 1 is a circuit diagram of a conventional frequency detection circuit that obtains multiple isolated frequency signals, Figure 2 is a diagram of the frequency detection circuit operating waveforms when the frequency is low, and Figure 3 is a diagram of the frequency detection circuit when the frequency is high. FIG. 3 is an operation waveform diagram of the frequency detection circuit of FIG. FIG. 4 is a circuit diagram showing an embodiment of the present invention, and FIG. 5 is a circuit diagram showing a second embodiment of the present invention. 1...Input terminal, 2...Input transformer,
3... Waveform shaper, 4... Pulse generator, 5, 15... Switching contact, 6, 16, 26...
...Reference voltage generator? , 17.27...
・Base drive circuit, 8.18°28...transistor, 9.19,29...DC amplifier, 10
．． 20.30... Output terminal, 11...
Voltage/frequency converter, 12...Isolation transformer, 1
3...Frequency/voltage converter, 17P, 27P・
Song/Hotocoupler. Figure 2 Figure 3
Claims (1)
整形器が出力する矩形波の立上り点または立下り点を起
点にして前記交流入力周波数の最短周期より長くない一
定時間幅のパルスを発生するパルス発生器と、相互に絶
縁された基準直流電圧を発生する複数の基準電圧発生器
と、前記パルス発生器出力信号に同期して前記基準直流
電圧を別個に断続する相互に絶縁された複数の開閉器と
、該開閉器が出力する断続直流電圧を別個に平滑された
直流電圧にする複数の直流増幅器とを備えてなる周波数
検出回路。A waveform shaper that shapes an AC input voltage into a rectangular wave, and a pulse with a constant time width not longer than the shortest period of the AC input frequency starting from the rising or falling point of the rectangular wave output by the waveform shaper. a plurality of reference voltage generators that generate mutually isolated reference DC voltages; and a plurality of mutually isolated reference voltage generators that separately intermittent the reference DC voltages in synchronization with the pulse generator output signal. A frequency detection circuit comprising a plurality of switches and a plurality of DC amplifiers that convert intermittent DC voltages outputted from the switches into separately smoothed DC voltages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16976783U JPS6080357U (en) | 1983-11-01 | 1983-11-01 | frequency detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16976783U JPS6080357U (en) | 1983-11-01 | 1983-11-01 | frequency detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6080357U true JPS6080357U (en) | 1985-06-04 |
Family
ID=30370799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16976783U Pending JPS6080357U (en) | 1983-11-01 | 1983-11-01 | frequency detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6080357U (en) |
-
1983
- 1983-11-01 JP JP16976783U patent/JPS6080357U/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6080357U (en) | frequency detection circuit | |
| US4668938A (en) | Switching amplifier and electronic siren employing the same | |
| JPS6080359U (en) | Phase difference detection circuit | |
| JPS5928470Y2 (en) | Sounding body drive device | |
| JPS5958461U (en) | AC high voltage power supply for copying machines | |
| JPS6082275U (en) | power detection circuit | |
| JPS5920314U (en) | DC stabilized power supply | |
| JPS60158161U (en) | frequency/voltage converter | |
| JPH02266610A (en) | Oscillation circuit | |
| JPS59179385U (en) | Phase difference detection circuit | |
| JPS59149488U (en) | Control circuit of inverter device | |
| JPS58121184U (en) | Synchronous signal generation circuit | |
| JPS59108376U (en) | television receiver | |
| JPH04244785A (en) | Low frequency oscillator circuit | |
| JPS59167444U (en) | Power-on phase signal generator | |
| KR930015668A (en) | TV's horizontal hold and horizontal polarity switching circuit | |
| JPS6110046U (en) | AC uninterruptible power supply | |
| JPS58103316U (en) | Differential transformer drive circuit | |
| JPS6125038U (en) | AC undervoltage detection circuit | |
| JPS61187120U (en) | ||
| JPS59159071U (en) | Video fader circuit | |
| JPS59188406U (en) | dental checker | |
| JPS5864142U (en) | touch switch circuit | |
| JPS58114656U (en) | Blanking pulse generation circuit | |
| JPS59155879U (en) | Gate control device for power conversion equipment |