JPS59104077U - Motor speed detection circuit - Google Patents
Motor speed detection circuitInfo
- Publication number
- JPS59104077U JPS59104077U JP1982202445U JP20244582U JPS59104077U JP S59104077 U JPS59104077 U JP S59104077U JP 1982202445 U JP1982202445 U JP 1982202445U JP 20244582 U JP20244582 U JP 20244582U JP S59104077 U JPS59104077 U JP S59104077U
- Authority
- JP
- Japan
- Prior art keywords
- detection circuit
- level detection
- motor speed
- speed detection
- signal
- 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.)
- Granted
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Control Of Electric Motors In General (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図は従来のレベル検出回路の一例を示すブロック図
、第２図は第１図の要部の出力波形図、第３図は本考案
の実施例を示すブσツク図、第４図は第３−図の要部の
出力波形図である。
なお、図面に用いた符号において、１・・・・・・ＦＧ
。
３・・・・・・リミッタアンプ、４・・・・・・コンパ
レータ、６゜７・・・・・・フリップフロップ、８．９
・・・・・・インバータ、１Ｑ・・・・・・移相回路、
１１・・・・・・ゼロクロス検出回路、１２・・・・・
・ナントゲートである。FIG. 1 is a block diagram showing an example of a conventional level detection circuit, FIG. 2 is an output waveform diagram of the main part of FIG. 1, FIG. 3 is a block diagram showing an embodiment of the present invention, and FIG. 4 is a block diagram showing an example of a conventional level detection circuit. 3 is an output waveform diagram of the main part of FIG. In addition, in the symbols used in the drawings, 1...FG
. 3...Limiter amplifier, 4...Comparator, 6゜7...Flip-flop, 8.9
...Inverter, 1Q...Phase shift circuit,
11... Zero cross detection circuit, 12...
・This is Nantes Gate.
Claims (1)
の無いとき出力信号が変化しないように成さく且つ上記
出力信号が上記第１のレベル検出回路の出力信号に対し
て所定の位相差を持つように成された第２のレベル検出
回路と、上記第１及び第２のレベル検出回路の出力信号
が加えられる論理回路とから成り、上記論理回路より上
記第１のレベル検出回路の出力信号を周波数逓倍した信
号を得るようにしたことを特徴とするレベル検出装置。a first level detection circuit configured with high precision; and a first level detection circuit configured so that the output signal does not change when there is no input signal, and the output signal has a predetermined phase difference with respect to the output signal of the first level detection circuit. and a logic circuit to which the output signals of the first and second level detection circuits are applied, and the output signal of the first level detection circuit is A level detection device characterized in that a signal obtained by frequency-multiplying the signal is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982202445U JPS59104077U (en) | 1982-12-28 | 1982-12-28 | Motor speed detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982202445U JPS59104077U (en) | 1982-12-28 | 1982-12-28 | Motor speed detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59104077U true JPS59104077U (en) | 1984-07-13 |
| JPH0543414Y2 JPH0543414Y2 (en) | 1993-11-01 |
Family
ID=30427916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1982202445U Granted JPS59104077U (en) | 1982-12-28 | 1982-12-28 | Motor speed detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59104077U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5745719A (en) * | 1980-09-01 | 1982-03-15 | Comput Basic Mach Technol Res Assoc | Readout circuit for magnetic disc device |
-
1982
- 1982-12-28 JP JP1982202445U patent/JPS59104077U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5745719A (en) * | 1980-09-01 | 1982-03-15 | Comput Basic Mach Technol Res Assoc | Readout circuit for magnetic disc device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0543414Y2 (en) | 1993-11-01 |
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