A DC to 4 GHz fully differential wideband digitally controlled variable gain amplifier

• Main Authors: Kumar, Thangarasu Bharatha, Ma, Kaixue, Yeo, Kiat Seng, Mou, Shouxian, Mahalingam, Nagarajan, Gu, Jiang Min, Lim, Kok Meng, Yang, Lu, Yu, Hao
• Other Authors: School of Electrical and Electronic Engineering
• Format: Conference or Workshop Item
• Language: English
• Published: 2013
• Subjects: DRNTU::Engineering::Electrical and electronic engineering
• Online Access: https://hdl.handle.net/10356/99774; http://hdl.handle.net/10220/17788; http://ieeexplore.ieee.org.ezlibproxy1.ntu.edu.sg/xpl/login.jsp?tp=&arnumber=5728319&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D5728319
• Institution: Nanyang Technological University

A Variable Gain and Attenuation control Amplifier (VGA) operating with low power, wide bandwidth and large Gain range for interfacing 60GHz RF front-end to Digital Baseband processor has been designed in 180nm SiGe BiCMOS technology from Jazz Semiconductor. The VGA is implemented using two stage amplifier followed by a Buffer stage with additional Diode linearizer for improving the input referred 1dB compression point. The performance parameters of the proposed VGA is been simulated and achieves a Gain range of -10dB to +10dB with 3-dB Bandwidth of greater than 4GHz. This VGA topology has good input and output matching. The complete circuit consumes about 9mW power from a DC 1.8V supply and the Core circuit (excluding I/O Pads) occupies a chip area of 170μm x 60μm.