A New Approach To Complex Band pass Sigma Delta Modulator Design For GPS/Galileo Receiver

In this paper, a new complex band pass filter architecture for continuous time complex band pass sigma delta modulator is presented. In continuation of paper the modulator is designed for GPS and Galileo receiver. This modulator was simulated in standard 0.18 μm CMOS TSMC technology and has bandwidth of 2MHz and 4MHz for GPS and Galileo centered in 4.092MHz. The dynamic range (DR) is 56/48 dB (GPS/Galileo) at sampling rate of 125 MHz. The modulator has power consumption of 4.1mw with 3V supply voltage.

Keywords:

continuous time , quadrature , sigma delta , MOS , modulator , OTA