Title :
A low power programmable gain amplifier with 70-dB control range in CMOS technology
Author :
Zhang, Bingzhao ; Li, Zhiqun
Author_Institution :
Inst. of RF- & OE-ICs, Southeast Univ., Nanjing, China
Abstract :
This paper presents a low power programmable gain amplifier (PGA) for low intermediate frequency (IF) Zigbee transceiver applications in 0.18-μm CMOS process. The designed PGA uses ac coupling between the stages to avoid the amplification of DC offset. The post-simulations demonstrate the gain of the PGA can be varied linearly from 0 dB to 70 dB with a step size of 2 dB. The PGA can operate even if an input DC offset of 30 mV. The differential output swing is 1.2 Vpp. The simulated 3 dB bandwidth is higher than 15 MHz and the gain error is less than 0.7 dB with capacitive loads of 2 pF. The PGA consumes only 4mW from 1.8 V supply. The chip area is 1.50×0.80 mm2.
Keywords :
CMOS analogue integrated circuits; Zigbee; amplifiers; low-power electronics; radio transceivers; CMOS technology; ac coupling; capacitance 2 pF; dc offset; gain 0 dB to 70 dB; low intermediate frequency Zigbee transceiver applications; low power programmable gain amplifier; power 4 mW; size 0.18 mum; voltage 1.2 V; voltage 1.8 V; voltage 30 mV; Bandwidth; CMOS integrated circuits; Electronics packaging; Gain; Linearity; Power dissipation; Resistors;
Conference_Titel :
Communication Technology (ICCT), 2011 IEEE 13th International Conference on
Conference_Location :
Jinan
Print_ISBN :
978-1-61284-306-3
DOI :
10.1109/ICCT.2011.6158046