发明名称 |
Apparatus and method for providing an output signal indicative of a speed of rotation and a direction of rotation of a ferromagnetic object |
摘要 |
An apparatus and a method provide an output signal indicative of a speed of rotation and a direction of rotation of a ferromagnetic object capable of rotating. A variety of signal formats of the output signal are described. |
申请公布号 |
US8994369(B2) |
申请公布日期 |
2015.03.31 |
申请号 |
US201314093815 |
申请日期 |
2013.12.02 |
申请人 |
Allegro Microsystems, LLC |
发明人 |
Vig Ravi;Scheller P. Karl;David Paul A. |
分类号 |
G01B7/30;G01R33/07;G01P3/48;G01P3/44;G01P3/488;G01P3/489;G01P13/04 |
主分类号 |
G01B7/30 |
代理机构 |
Daly, Crowley, Mofford & Durkee, LLP |
代理人 |
Daly, Crowley, Mofford & Durkee, LLP |
主权项 |
1. A rotation detector, comprising:
a magnetic field sensor for providing an output signal proportional to a magnetic field associated with a ferromagnetic object capable of rotating; one or more detector circuits coupled to receive the output signal from the magnetic field sensor, each configured to detect a rotation of the ferromagnetic object, the one or more detector circuits configured to generate a respective one or more output signals, each output signal having respective rising and falling edges; and an output protocol circuit coupled to receive the one or more output signals from the one or more detector circuits and configured to generate an output signal indicative of a speed of rotation of the ferromagnetic object and also indicative of a direction of rotation of the ferromagnetic object, wherein the output signal generated by the output protocol circuit comprises:
instances of a first pulse set when the ferromagnetic object is rotating in a first direction and instances of a second different pulse set when the ferromagnetic object is rotating in a second different direction, wherein each instance of the first pulse set consists of a first quantity of pulses having one or more pulses and each instance of the second pulse set consists of a second different quantity of pulses having one or more pulses. |
地址 |
Worcester MA US |