Phone:

+49 371 33 77 - 0

Fax::

+49 371 33 77 272

Internet:

www.gemac-chemnitz.de

Email:

interpolation@gemac-chemnitz.de

sales@gemac-chemnitz.de

GEMAC

Gesellschaft für

Mikroe lektronikanwendung Chemnitz mbH

Zwickauer Straße 227

D-09116 Chemnitz, Germany

Date: 20.04.04

Page 3 of 30

Title:

Data Sheet GC-IP200

Name of Document:

43500-DB-2-1-E-IP200.pdf

1

Overview

The IP200 interpolation circuit is designed for connection to incremental position and angle measuring

systems with sine-shaped output signals with a 90° phase shift. It can be operated at a large number of

transducer systems working according to the most varied measuring principles. With a maximum

interpolation rate of 200 the IC is capable to split the input signal period into up to 200 segments. A counter

value can be output via parallel or serial interface, respectively.

Different interfaces and flexible configuration types enable the use of the IP200 in single-chip interpolation

systems, in microcontroller-based measuring devices and in multi-channel systems alike. Proprietary

automatic gain and offset control, as well as the possibility of a analogue phase correction ensure a high

measuring precision under industrial conditions. The integrated two-level measuring value trigger and the

additional parallel high speed output makes the IC suitable for use in real time applications.

Block Diagram

Inst-Amp

Phase

parallel IF

ADC

ADC

Inst-Amp

ATAN

Controller

Comp

PHI

A/B

Counter

Filter

serial IF

Error ?

Config

Phase

Interpolation Rate

Interval Time

Filter

...

Trigger

Reset

Clock

Cosine

Sine

Reference

GEMAC IP200

Digital

Analog

Figure 1

Inst-Amp

Instrumentation amplifier

ADC

Analogue-Digital-Converter

ATAN

ARCTAN-processing-unit

A/B

Generation of the A/B-signals

serial IF

Serial Interface

parallel IF

Parallel Interface