Title :
Variable-bandwidth filter using SCF and MOSFET-C filter
Author :
Sawahashi, Mamom ; Murota, Kazuaki
Author_Institution :
NTT Radio Commun. Syst. Lab., Yokosuka, Japan
Abstract :
A novel variable-bandwidth filter which fulfils requirements for mobile radio receiver applications is proposed. The proposed filter combines a switched-capacitor filter (SCF) and a MOSFET-C filter, providing the variable-bandwidth feature without a conventional pre- and post-filter. This filter also has low-noise and wide-dynamic-range characteristics. The design method, frequency characteristics, and feasibility of mobile radio receiver applications are presented
Keywords :
active filters; mobile radio systems; radio receivers; radiofrequency filters; switched capacitor filters; MOSFET-C filter; SC filter; design method; frequency characteristics; low-noise; mobile radio receiver applications; switched-capacitor filter; variable-bandwidth filter; wide-dynamic-range characteristics; Design methodology; Digital filters; Frequency; Land mobile radio; Low pass filters; MOSFET circuits; Monolithic integrated circuits; Receivers; Resistors; Transfer functions;
Conference_Titel :
Circuits and Systems, 1989., IEEE International Symposium on
Conference_Location :
Portland, OR
DOI :
10.1109/ISCAS.1989.100631
