资料介绍
This application note describes the Excel spreadsheet
to design base station coils. The spreadsheet file
name is basesta.xls. A zip file containing this spread -
sheet and a copy of this application note can be down -
loaded from Microchip’s web site at
www.microchip.com.
The basic approach used is to choose the driver cir -
cuit driving voltage and current. These two values are
used to calculate the total resistance that the series
resistor-inductor-capacitor (RLC) circuit should have.
Secondly, the resonating capacitor rated voltage is
chosen. The coil inductance and resonating capacitor
value can then be calculated.
For a given coil inductance and coil resistance, choos -
ing the coil average diameter and coil winding aspect
ratio determines the coil dimensions, number of turns
and wire diameter.
The magnetic field strength can be calculated at any
given distance given the coil average diameter, number
of turns and coil current. AN677
Designing a Base Station Coil for the HCS410
Author: Mike Sonnabend, Jan van Niekerk
INTRODUCTION
Microchip Technology Inc. Overview of Inductive Communication
Communication between a KEELOQ transponder and
a base station occurs via magnetic coupling between
OVERVIEW the transponder coil and base station coil.
The base station coil forms part of a series RL
我要上传