Title :
A 1 to 5GHz adjustable active polyphase filter for LO quadrature generation
Author :
Kaltiokallio, Mikko ; Ryynnen, Jussi
Author_Institution :
Dept. of Micro & Nanosci., Aalto Univ., Espoo, Finland
Abstract :
This paper focuses on the design of a highly tunable active polyphase filter with IRR better than 40dB. The active polyphase filter is implemented as a part of a simple RF receiver to demonstrate its feasibility for wide variety of wireless systems. The design consists of a high frequency adjustable gm-element that is optimized for active PPF. The filter achieves a tuning range of 1 to 5GHz while consuming supply current of 0.7 to 4.4mA. The silicon area of the filter is 64×85μm.
Keywords :
active filters; oscillators; radio receivers; LO quadrature generation; RF receiver; adjustable active polyphase filter; current 0.7 mA to 4.4 mA; frequency 1 GHz to 5 GHz; Bandwidth; Circuit stability; Frequency measurement; Receivers; Semiconductor device measurement; Transconductance; Tuning; Active polyphase filter; cognitive radio; divider; radio receiver; tunable amplifier; tunable filter;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium (RFIC), 2011 IEEE
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4244-8293-1
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2011.5940652
