Title :
A high-linearity CMOS Programmable Gain Amplifier for wireless communications
Author :
Lei, Qianqian ; Lin, Min ; Chen, Zhiming ; Shi, Yin
Author_Institution :
Dept. of Appl. Electron., Xi´´an Univ. of Technol., Xi´´an, China
Abstract :
A low-power high-linearity PGA (Programmable Gain Amplifier) is proposed in this paper. The PGA adopts a differential degeneration structure to vary voltage gain and uses the closed-loop structure including the input op-amps to enhance the linearity. This PGA is fabricated in TSMC 0.13um CMOS technology. The measurements show that the PGA provides 64dB (3dB~66dB) gain range with a step of 1dB, the bandwidth of the multi-stage PGA is higher than 20MHz. The IIP3 (third order input referred intercept point) of the PGA is measured to be as high as 20dBm at the minimum gain, meanwhile the NF is 28dB when the PGA gain at 34dB settings. The PGA chain consumes 7mA (I path) from 3.3V single supply voltage.
Keywords :
CMOS analogue integrated circuits; amplifiers; radio networks; CMOS technology; closed-loop structure; current 7 mA; differential degeneration structure; gain 34 dB; high-linearity CMOS programmable gain amplifier; input op-amps; noise figure 28 dB; size 0.13 mum; voltage 3.3 V; voltage gain; wireless communication; Baseband; CMOS integrated circuits; CMOS technology; Electronics packaging; Linearity; Noise measurement; Resistors;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2010 10th IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-5797-7
DOI :
10.1109/ICSICT.2010.5667799
