Position measuring device and method for operating a position measuring device

摘要

The period variation circuit has sin and cosine inputs (SIN,COS) fed to an interpolation circuit (29) which produces a square-wave (DS). A direction-determination circuit (23) produces a signal (RS), fed into an address counter circuit (24) with the square-wave. The address counter circuit produces two address number signals (34A,34B) applied to tables (21A 1 to 21A k) and (21B 1 to 21B k) in calculation table fields (21A,21B). The table outputs are passed to digital/analog converters (22A,22B) to form analog incremental signals (SIN',COS').