18-07-2012, 01:32 PM
Near-Field Communication
Communication.ppt (Size: 1.22 MB / Downloads: 398)
Introduction
NFC is a short-range wireless technology.
NFC provides unique advantages over other available wireless technologies.
The design includes a near-field transmitter and receiver to send data from one computer to another
Benefits & Features
Not restricted to 1-to-1 communication
Multiple devices in a small area can communicate with each other using the same frequency.
Maximum transfer bit rate of 800kbps.
No special software is required.
Operation at a frequency of 13.5 MHz
No ethical concerns due to range
PC Interface
Connects through serial cable
Received by MAX232A
0 to 5V square wave
Voltage divider
Non-inverting voltage adder
Voltage Controlled Oscillator
Operates on a 12-V power supply
Accepts an input from 3.7V to 4.2V from the PC interface.
Outputs a signal whose frequency varies according to the input voltage level
Communication.ppt (Size: 1.22 MB / Downloads: 398)
Introduction
NFC is a short-range wireless technology.
NFC provides unique advantages over other available wireless technologies.
The design includes a near-field transmitter and receiver to send data from one computer to another
Benefits & Features
Not restricted to 1-to-1 communication
Multiple devices in a small area can communicate with each other using the same frequency.
Maximum transfer bit rate of 800kbps.
No special software is required.
Operation at a frequency of 13.5 MHz
No ethical concerns due to range
PC Interface
Connects through serial cable
Received by MAX232A
0 to 5V square wave
Voltage divider
Non-inverting voltage adder
Voltage Controlled Oscillator
Operates on a 12-V power supply
Accepts an input from 3.7V to 4.2V from the PC interface.
Outputs a signal whose frequency varies according to the input voltage level