EVB90109 Datasheet, PDF (6/10 Pages) Melexis Microelectronic Systems – MLX90109 Evaluation Board

EVB90109
MLX90109 Evaluation Board
2.7 Fast decay circuit
Very small fall time may be required in fast protocol, to be understood by the transponder in the field. This is
why, the EVB90109 include a “fast decay” circuit controlled through the pin FAST_DECAY and composed of
the transitstor Q1 and the diode D1. The following picture shows how to implement the “fast decay” system.
Picture 1: Fast Decay module control, (1) Antenna, (2) MODUR2, (3) FAST_DECAY
390129010901
Rev 005
Page 6 of 10
Evaluation Board
Aug-2005