Quadrature decoder with position and speed sensing

Abstract

Quadrature decoder is used for direct interface with linear or incremental encoder to get direction, position and speed information from a rotating system. It plays an important role in motor control applications. This project is designed to calculate an input device position, speed and acceleration based on the design specification given. It is developed using Verilog HDL. The design is simulated and verified using Altera Modelsim 6.4a software. Full decoding mode is used for finer resolution and accurate measurement. The design approaches aimed to minimize the uses of the registers and to provide a better control system. A common architecture of Verilog HDL is built in order to make design easy to debug. Each module designed has its own function. Waveform simulation is done for every possible input condition in order to check the functionality of each design block. The overall result proved that the design is successfully done and has met the design specification.