Encoder output divider and R/D converter

Coded data generation or conversion – Digital pattern reading type converter – Incremental

Reexamination Certificate

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Details

C341S116000

Reexamination Certificate

active

07119717

ABSTRACT:
A Resolver/Digital (R/D) converter includes an encoder output divider having a DSP generating 14-bit encoded signals A2and B2from a timing analysis performed during the first period of 12-bit encoded signal A1. The DSP generates a selection signal output to a multiplexer to select encoded signals A1and BE1or encoded signals A2and B2depending on the rotational speed of the rotor of a resolver. Based on the selection signal, the multiplexer outputs 12-bit encoded signals A1and B1when the rotational speed is less than 400 rpm or greater than 1200 rpm, and outputs 14-bit encoded signals A2and B2when rotational speed is between 400 rpm and 1200 rpm.

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