AMPLITUDE SHIFT KEYING MODULATOR FOR DEDICATED SHORT RANGE COMMUNICATION SYSTEM

摘要

An amplitude shift key modulation device for a dedicated short range communication system is arranged to enhance a filtering effect of data signals by using a balancing circuitry of a MOSFET (Metal Oxide Semiconductor Field Effect Transistor), has a linear characteristic. One data signal transmission unit (44) include the MOSFET for receiving data-signal for a base band from gate terminals and at lineally output baseband data signals to drain terminals to will not occur hamonic function. One is asked that (amplitude shift keying) modulation unit (42) includes a BJT (bipolar junction transistor), has an emitter, for receiving data signals, one base terminal, for receiving carrier frequency signaling and a collector terminal, for exporting modulated data signal. One bias unit (46) controls the voltage environment of electric current and data signal transmission unit and ASK modulation units.