Method and apparatus to process an analog encoder signal

Details Method and apparatus to process an analog encoder signal Method and apparatus to process an analog encoder signal

2006-09-05

2006-09-05

Leykin, Rita (Department: 2837)

Electricity: motive power systems

Positional servo systems

Analog computation

C318S560000, C318S661000, C318S654000

Reexamination Certificate

active

07102317

ABSTRACT:
A method and apparatus to process an analog encoder signal. The apparatus includes an analog encoder pattern generating unit, an analog encoder pattern storage unit, a digital/analog converting unit, a comparing unit, a recent state latch unit, a present state determining unit, and a gray code converting unit. The method includes generating an analog encoder pattern by sampling and quantizing a quasi-sinusoidal wave signal output from an analog encoder during initialization; determining a recent state and a present estimated state by comparing the analog encoder pattern with the quasi-sinusoidal wave signal; and generating quadrature signals from the recent state and the present estimated state.

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