Title :
Neutralized differential amplifiers using mixed-mode S-parameters
Author :
Stengel, Bob ; Thompson, Bruce
Author_Institution :
Motorola Labs, Plantation, FL, USA
Abstract :
Distributed amplifiers offer very broadband operation, with the promise of a single all-band wireless solution. However, there are a number of distributed amplifier specific issues that have blocked practical implementation in a portable product. One of these is potential instability exacerbated by 20:1 antenna load impedance variation over a very broad frequency range of interest. This paper provides a neutralized differential amplifier implementation supported by mixed-mode S-parameters technology that offers a broadband stability solution for distributed amplifier application. Measurement results of a single section differential amplifier are included using Motorola´s CDR1 BiCMOS technology.
Keywords :
BiCMOS analogue integrated circuits; MMIC amplifiers; S-parameters; differential amplifiers; distributed amplifiers; wideband amplifiers; CDR1 BiCMOS technology; antenna load impedance variation; broadband operation; distributed amplifier; mixed-mode S-parameters; neutralized differential amplifiers; single all-band wireless solution; single section differential amplifier; Differential amplifiers; Distributed amplifiers; Equations; Frequency; Impedance; Integrated circuit measurements; Loaded antennas; Measurement standards; Radiofrequency identification; Scattering parameters;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2003 IEEE
Print_ISBN :
0-7803-7694-3
DOI :
10.1109/RFIC.2003.1214046
