Title :
Flexible Programmable Gain Amplifier for Reconfigurable Direct-Conversion Receiver
Author :
Ma Liangyi ; Fan Xiangning ; Bao Kuan
Author_Institution :
Inst. of RF& OE-ICs, Southeast Univ., Nanjing, China
Abstract :
This paper presents a flexible Programmable Gain Amplifier (PGA) with DC Offset Cancellation (DOC) for reconfigurable direct-conversion receiver. This circuit is designed for reconfiguration of GPS/Galileo and WCDMA dual mode receiver in order to reduce power consumption, because it consumes different current and provides different bandwidths in different working conditions. This PGA consists of one-stage variable gain amplifier and two-stage fixed gain amplifiers which uses closed-loop resistor-feedback circuit and DOC for each stage based on a DC negative feedback technique. Designed in TSMC 0.18 μm technology, this PGA provides a gain range from 0dB to 75dB and its power consumption is 1.087mA in 2MHz 3dB-bandwidth and 3.34mA in 12MHz 3dB-bandwidth.
Keywords :
Global Positioning System; amplification; amplifiers; code division multiple access; receivers; DC offset cancellation; DOC; GPS/Galileo; PGA; TSMC technology; WCDMA dual mode receiver; flexible programmable gain amplifier; power consumption; reconfigurable direct-conversion receiver; Bandwidth; Electronics packaging; Global Positioning System; Multiaccess communication; Receivers; Resistors; Spread spectrum communication; DC Offset Cancellation; PGA; direct-conversion receiver; rconfigurable;
Conference_Titel :
Computer Science & Service System (CSSS), 2012 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4673-0721-5
DOI :
10.1109/CSSS.2012.320
