JPH0370320U - - Google Patents
Info
- Publication number
- JPH0370320U JPH0370320U JP13111989U JP13111989U JPH0370320U JP H0370320 U JPH0370320 U JP H0370320U JP 13111989 U JP13111989 U JP 13111989U JP 13111989 U JP13111989 U JP 13111989U JP H0370320 U JPH0370320 U JP H0370320U
- Authority
- JP
- Japan
- Prior art keywords
- constant current
- current supply
- power source
- supply circuit
- magnetoresistive element
- 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 5
- 238000010586 diagram Methods 0.000 description 7
Description
第１図は本考案にかかるエンコーダの検出信号
処理回路の一実施例を示す回路図、第２図は同上
実施例による通常時の磁気抵抗素子の出力を示す
波形図、第３図は同じくバツクアツプ時の磁気抵
抗素子の出力を示す波形図、第４図は本考案にか
かるエンコーダの検出信号処理回路の別の実施例
を示す回路図、第５図は従来のエンコーダの検出
信号処理回路の例を示す回路図、第６図は同上従
来例を簡略化して示す回路図、第７図は同上従来
例による通常時の磁気抵抗素子の出力を示す波形
図、第８図は同じくバツクアツプ時の磁気抵抗素
子の出力を示す波形図である。
１……ドライブ電源、２……バツクアツプ電源
、３……センサ部、４……カウンタ、ＭＲ１，Ｍ
Ｒ２……磁気抵抗素子、５……定電流供給装置を
構成するオペアンプ、ＴＲ１，ＴＲ２……定電流
供給装置を構成するトランジスタ。
FIG. 1 is a circuit diagram showing an embodiment of the detection signal processing circuit of an encoder according to the present invention, FIG. 2 is a waveform diagram showing the output of the magnetoresistive element during normal operation according to the same embodiment, and FIG. FIG. 4 is a circuit diagram showing another embodiment of the encoder detection signal processing circuit according to the present invention, and FIG. 5 is an example of a conventional encoder detection signal processing circuit. FIG. 6 is a simplified circuit diagram of the conventional example, FIG. 7 is a waveform diagram showing the output of the magnetoresistive element during normal operation according to the conventional example, and FIG. 8 is a diagram showing the magnetic resistance during backup. FIG. 3 is a waveform diagram showing the output of a resistive element. 1...Drive power supply, 2...Backup power supply, 3...Sensor section, 4...Counter, MR1 ,M
R 2 ... Magnetoresistive element, 5 ... Operational amplifier constituting the constant current supply device, TR 1 , TR 2 ... Transistor constituting the constant current supply device.
Claims (1)
を備え、センサ部からの検出信号をカウンタでカ
ウントするエンコーダの検出信号処理回路であつ
て、 上記センサ部は、磁気抵抗素子とこの磁気抵抗
素子へ電流を供給する定電流供給装置を有してな
り、 上記定電流供給装置は、ドライブ電源を電源と
する第１の定電流供給回路と、バツクアツプ電源
を電源として上記第１の定電流供給回路による定
電流よりも小さな定電流を得る第２の定電流供給
回路とを有することを特徴とするエンコーダの検
出信号処理回路。[Claim for Utility Model Registration] A detection signal processing circuit for an encoder that is equipped with a drive power supply and a backup power supply for use in the event of a power outage, and that counts detection signals from a sensor section with a counter, the sensor section comprising a magnetoresistive element. and a constant current supply device for supplying current to the magnetoresistive element, and the constant current supply device includes a first constant current supply circuit using a drive power source as a power source, and a first constant current supply circuit using a backup power source as a power source. and a second constant current supply circuit that obtains a constant current smaller than the constant current provided by the constant current supply circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989131119U JPH0729458Y2 (en) | 1989-11-10 | 1989-11-10 | Encoder detection signal processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989131119U JPH0729458Y2 (en) | 1989-11-10 | 1989-11-10 | Encoder detection signal processing circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0370320U true JPH0370320U (en) | 1991-07-15 |
| JPH0729458Y2 JPH0729458Y2 (en) | 1995-07-05 |
Family
ID=31678645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989131119U Expired - Lifetime JPH0729458Y2 (en) | 1989-11-10 | 1989-11-10 | Encoder detection signal processing circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0729458Y2 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5868615A (en) * | 1981-10-20 | 1983-04-23 | Sharp Corp | Output circuit of magnetic type rotary encoder |
| JPS62154754U (en) * | 1986-03-24 | 1987-10-01 | ||
| JPS63305211A (en) * | 1987-06-05 | 1988-12-13 | Shicoh Eng Co Ltd | Magnetic encoder for clearing absolute position |
| JPH01129620U (en) * | 1988-02-19 | 1989-09-04 | ||
| JPH01301113A (en) * | 1988-05-30 | 1989-12-05 | Shicoh Eng Co Ltd | Signal processing circuit for magneto-resistance element |
-
1989
- 1989-11-10 JP JP1989131119U patent/JPH0729458Y2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5868615A (en) * | 1981-10-20 | 1983-04-23 | Sharp Corp | Output circuit of magnetic type rotary encoder |
| JPS62154754U (en) * | 1986-03-24 | 1987-10-01 | ||
| JPS63305211A (en) * | 1987-06-05 | 1988-12-13 | Shicoh Eng Co Ltd | Magnetic encoder for clearing absolute position |
| JPH01129620U (en) * | 1988-02-19 | 1989-09-04 | ||
| JPH01301113A (en) * | 1988-05-30 | 1989-12-05 | Shicoh Eng Co Ltd | Signal processing circuit for magneto-resistance element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0729458Y2 (en) | 1995-07-05 |
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