Title :
A new design approach for variable-gain low noise amplifiers
Author :
Pennisi, S. ; Scaccianoce, S. ; Palmisano, G.
Author_Institution :
STMicroelectron., Catania, Italy
Abstract :
A new approach to the design of variable-gain low noise amplifiers is presented in which input and output signals can be switched among circuit branches with different features. It can be arranged for high linearity performance and/or different frequency shapes. Moreover, it allows matching conditions for multi-band applications to be met. As a design example, a 900 MHz three-gain level low noise amplifier was designed in a 20 GHz bipolar technology. The circuit exhibits a maximum gain and a noise figure of 26 dB and 2.1 dB, respectively and provides accurate input and output matching.
Keywords :
UHF amplifiers; UHF integrated circuits; bipolar analogue integrated circuits; impedance matching; integrated circuit design; integrated circuit noise; 2.1 dB; 20 GHz; 26 dB; 900 MHz; bipolar technology; circuit branches; high linearity performance; input matching; low noise amplifiers; matching conditions; multi-band applications; output matching; variable-gain LNA design; Circuit noise; Frequency; Linearity; Low-noise amplifiers; Multi-stage noise shaping; Noise figure; Noise level; Shape; Signal design; Switching circuits;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2000. Digest of Papers. 2000 IEEE
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-6280-2
DOI :
10.1109/RFIC.2000.854434
