Title:
PHOTOCELL FOR OPTICAL ENCODER AND DECODING APPARATUS FOR OPTICAL MAGNETIC ENCODER
Document Type and Number:
WIPO Patent Application WO/2021/017073
Kind Code:
A1
Abstract:
A photocell (10) for an optical encoder and a decoding apparatus for an optical magnetic encoder. The photocell (10) integrates at least an operational amplifier single-ended output circuit (11) and a comparator circuit (12); a forward and reverse sine signal and a forward and reverse cosine signal generated on the basis of optical signals are respectively processed by means of the operational amplifier single-ended output circuit (11) and the comparator circuit (12), such that the photocell (10) can directly output a sine signal, a cosine signal, a digital sine signal and a digital cosine signal; and a forward sine signal, a reverse sine signal, a forward cosine signal and a reverse cosine signal that are not processed by the operational amplifier single-ended output circuit (11) and the comparator circuit (12) can also be output. Such a photocell (10) executes various kinds of processing on sine signals and cosine signals, and reduces the number of circuits connected between the photocell (10) and a processor (20), thereby simplifying a circuit structure on a circuit board and facilitating the miniaturization application of an encoder.
Inventors:
YAN PENGFEI (CN)
Application Number:
PCT/CN2019/102987
Publication Date:
February 04, 2021
Filing Date:
August 28, 2019
Export Citation:
Assignee:
ZHEJIANG HECHUAN TECH CO LTD (CN)
International Classes:
G01D5/56
Foreign References:
| CN108801301A | 2018-11-13 | |||
| CN203964930U | 2014-11-26 | |||
| CN109520529A | 2019-03-26 | |||
| US20090243599A1 | 2009-10-01 | |||
| JPH0829201A | 1996-02-02 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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