Title :
A 190MHz 4nV/√Hz analog baseband chain of Synthetic Aperture Radar (SAR) receiver
Author :
Abu Bakar, Faizah ; Nehal, Qaiser ; Ukkonen, Pekka ; Saari, Ville ; Halonen, Kari
Author_Institution :
Sch. of Sci. & Technol., Dept. of Micro & Nanosci., Aalto Univ., Aalto, Finland
Abstract :
An analog baseband chain for a Synthetic Aperture Radar (SAR) receiver implemented in a 130nm CMOS technology is presented in this paper. Occupying 0.23mm2 of silicon area, the baseband chain consists of a three-stage Variable Gain Amplifier (VGA), a 5th-order gm-C Low Pass Filter (LPF) and an Output Buffer (OBUF). The gain of the chain can be controlled by tuning the control voltages of the VGA and has a range from 25dB to 34dB. In addition, the LPF has an 8dB gain to meet the required dynamic range of the following block. The bandwidth of the LPF is programmable from 120MHz to 190MHz by means of capacitor matrices. The chain, which uses a 1.2V supply voltage, achieves 4nV/√(Hz) of input-referred noise density and -42dBV in-band IIP3.
Keywords :
CMOS integrated circuits; low-pass filters; radar receivers; synthetic aperture radar; CMOS technology; SAR receiver; VGA; analog baseband chain; capacitor matrix; frequency 120 MHz to 190 MHz; low pass filter; output buffer; size 130 nm; synthetic aperture radar receiver; variable gain amplifier; voltage 1.2 V; Baseband; Capacitance; Capacitors; Gain; Logic gates; Noise; Receivers;
Conference_Titel :
NORCHIP, 2010
Conference_Location :
Tampere
Print_ISBN :
978-1-4244-8972-5
Electronic_ISBN :
978-1-4244-8971-8
DOI :
10.1109/NORCHIP.2010.5669458
