A CMOS Norton amplifier-based digitally controlled VGA for low-power wireless applications
2001 (English)In: IEEE transactions on circuits and systems. 2, Analog and digital signal processing (Print), ISSN 1057-7130, E-ISSN 1558-125X, Vol. 48, no 3, 245-254 p.Article in journal (Refereed) Published
A CMOS variable-gain amplifier (VGA) for use in the baseband section of integrated wireless receivers is presented. The VGA circuit is based on a new CMOS realization of the Norton transresistance amplifier. The proposed CMOS realization operates from a 3-V supply voltage with rail-to-rail swing and class AB input and output stages. The standby current of the class AB stages employed can be accurately controlled, leading to a low power consumption, nonslew-rate-limited response. The VGA circuit provides a precise process-independent gain control range of 30 dB with 1-dB gain step. The circuit uses current division techniques to provide an area-efficient B-bit digital offset trimming capability Experimental results from a test chip fabricated through MOSIS are provided.
Place, publisher, year, edition, pages
2001. Vol. 48, no 3, 245-254 p.
low-power, Norton amplifier, VGA, wireless communications
IdentifiersURN: urn:nbn:se:kth:diva-20663ISI: 000168916700003OAI: oai:DiVA.org:kth-20663DiVA: diva2:339359
QC 201005252010-08-102010-08-10Bibliographically approved