Design and Development of Hardware and Firmware for A Multifunctional SMD Frequency Synthesizer

Abstract: The aim of this project is to design and develop hardware and firmware that are required for a multifunctional surface mount frequency synthesizer. The applications of this design includes following: a) Remote sensing Data down convertor b) QPSK Modulation

In Remote sensing data down convertor the frequency synthesizer, plays the important role of Local Oscillator carrier generation for mixing with the RF signal to generate fixed IF frequency. In the design of QPSK modulator it is used to provide variable clocks required by the FPGA to cater to the various data rates and also as the carrier signal. This development is centered around the design of SMD frequency synthesizer with Phase locked loop Logic.LMX 2541 ultralow noise frequency synthesizer is used here and it is initialized and configured for operation using AT89C55WD microcontroller unit. The firmware developed also includes handling peripheral devices like keypad and LCD display for configuration of the unit in stand-alone mode. The firmware was developed using Embedded C programming language on Keil platform.

Keywords: Remote sensing, frequency synthesizer, phase locked loop, KEIL