Digital interpolator for measuring distances, or angles, has phase correction element between analogue-digital converters and co-ordinate transformation element to correct phase of digital input signals

摘要

The device has two analogue-digital converters - ADCs - (4) for analogue input signals followed by a co-ordinate element (6) connected to an evaluation circuit (7) and a regulator (8). A phase correction element (5) is arranged between the ADCs and the co-ordinate transformation element to correct the phase of the digital input signals. One digital input signal and one phase-corrected signal are fed back via a phase regulator (15) to the phase correction element with an amplitude error value and an angle value.