JPH01121815U - - Google Patents
Info
- Publication number
- JPH01121815U JPH01121815U JP1660588U JP1660588U JPH01121815U JP H01121815 U JPH01121815 U JP H01121815U JP 1660588 U JP1660588 U JP 1660588U JP 1660588 U JP1660588 U JP 1660588U JP H01121815 U JPH01121815 U JP H01121815U
- Authority
- JP
- Japan
- Prior art keywords
- rotation
- detection circuit
- output
- circuit
- degrees
- 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
- 238000001514 detection method Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
第１図は本考案の一実施例による正転逆転判定
回路の構成を示すブロツク図、第２図ａ，ｂは第
１図の正転逆転判定回路の各部の波形図、第３図
は磁気抵抗効果素子の配置を示す図、第４図は回
転体及び磁石と磁気抵抗効果素子との位置関係を
示す図、第５図は従来の正転逆転判定回路の一構
成例を示すブロツク図、第６図ａ，ｂは第５図の
正転逆転判定回路の各部の波形を示す図である。
１：第１の回転検出回路、２：第２の回転検出
回路、３，４：磁気抵抗効果素子、５，６：増幅
回路、７，８：比較回路、９，１０：基準電圧、
１１：回路電源、１２：出力変化検出回路、１３
：スイツチ、２１：信号処理回路、２２：磁石、
２３：回転体。
Figure 1 is a block diagram showing the configuration of a forward/reverse rotation determination circuit according to an embodiment of the present invention, Figures 2a and b are waveform diagrams of various parts of the forward/reverse rotation determination circuit of Figure 1, and Figure 3 is a magnetic 4 is a diagram showing the positional relationship between the rotating body, the magnet, and the magnetoresistive element; FIG. 5 is a block diagram showing an example of the configuration of a conventional forward/reverse rotation determining circuit; 6a and 6b are diagrams showing waveforms of various parts of the forward/reverse rotation determination circuit of FIG. 5. FIG. 1: first rotation detection circuit, 2: second rotation detection circuit, 3, 4: magnetoresistive element, 5, 6: amplifier circuit, 7, 8: comparison circuit, 9, 10: reference voltage,
11: Circuit power supply, 12: Output change detection circuit, 13
: Switch, 21: Signal processing circuit, 22: Magnet,
23: Rotating body.
Claims (1)
び回転方向を、９０度の位相差をもつ２位相の検
出波形により判定する正転逆転判定回路に於て、 第１の回転検出回路と、 第１の回転検出回路の出力に対して９０度の位
相差のある検出波形を出力する第２の回転検出回
路と、 第１の回転検出回路の出力レベルの高レベルか
ら低レベル、或は低レベルから高レベルへの変化
を検出する出力変化検出回路と、 該出力変化検出回路の出力により第２の回転検
出回路への電力の供給を制御するスイツチとから
成ることを特徴とする正転逆転判定回路。[Claims for Utility Model Registration] In a forward/reverse rotation determination circuit that determines the rotation speed and rotation direction of a rotating body rotating around a rotation axis using two-phase detection waveforms with a phase difference of 90 degrees, a second rotation detection circuit that outputs a detection waveform with a phase difference of 90 degrees with respect to the output of the first rotation detection circuit; and a high level of the output level of the first rotation detection circuit. consisting of an output change detection circuit that detects a change from a low level to a high level, and a switch that controls the supply of power to a second rotation detection circuit based on the output of the output change detection circuit. A forward/reverse rotation determination circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1660588U JPH0633419Y2 (en) | 1988-02-10 | 1988-02-10 | Forward / reverse rotation determination circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1660588U JPH0633419Y2 (en) | 1988-02-10 | 1988-02-10 | Forward / reverse rotation determination circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01121815U true JPH01121815U (en) | 1989-08-18 |
| JPH0633419Y2 JPH0633419Y2 (en) | 1994-08-31 |
Family
ID=31229683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1660588U Expired - Lifetime JPH0633419Y2 (en) | 1988-02-10 | 1988-02-10 | Forward / reverse rotation determination circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0633419Y2 (en) |
-
1988
- 1988-02-10 JP JP1660588U patent/JPH0633419Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0633419Y2 (en) | 1994-08-31 |
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