Title :
A 22-mW 435-MHz differential CMOS high-gain LNA for subsampling receivers
Author :
Huang, Te-Hsin D. ; Zencir, Ertan ; Dogan, Numan S. ; Arvas, Ercument
Author_Institution :
Dept. of Electr. Eng., North Carolina A&T State Univ., Greensboro, NC, USA
Abstract :
A low-power, high-gain CMOS low noise amplifier (LNA) for use as the first stage of a subsampling receiver is proposed. The performance of +96 dB voltage gain and less than 1 dB noise figure (NF) with very low power consumption is reported for the first time and makes it suitable for use in a subsampling mixer with track and hold (T/H) circuit. The LNA contains both tuned and inductorless amplifier stages. The first stage utilizes optimum transistor gate width-length ratio (W/L), improved-Q on-chip spiral inductors, fully differential architecture, and current-reuse techniques to achieve low-noise, high-gain, and low-power at the same time. The following stages are inductorless amplifiers designed to achieve the maximum-gain. Cascode transistors are used in all stages to maintain reasonable gain at high frequencies and to achieve good reverse isolation. The amplifier linearity is sacrificed as a consequence of its high gain.
Keywords :
CMOS analogue integrated circuits; Q-factor; UHF amplifiers; UHF mixers; differential amplifiers; inductors; integrated circuit design; integrated circuit modelling; integrated circuit noise; low-power electronics; radio receivers; sample and hold circuits; space communication links; 1 dB; 22 mW; 435 MHz; 96 dB; CMOS differential high-gain LNA; NF; T/H circuit; amplifier linearity; cascode transistors; current-reuse techniques; deep-space applications; differential architecture; high frequency gain; inductor quality factor; inductorless amplifier stages; low-power CMOS low noise amplifier; noise figure; on-chip spiral inductor Q; optimum transistor gate width-length ratio; power consumption; reverse isolation; subsampling mixers; subsampling receiver first stage; track and hold circuit; tuned amplifier stages; voltage gain; Circuits; Energy consumption; Frequency; Inductors; Low-noise amplifiers; Noise figure; Noise measurement; Performance gain; Spirals; Voltage;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010380