Title :
A 3 GHz silicon-BJT active resonator and filter
Author :
Kaunisto, Risto ; Stadius, Kari ; Porra, Veikko
Author_Institution :
Inst. of Radio Commun., Helsinki Univ. of Technol., Espoo, Finland
Abstract :
A tunable active resonator for filtering applications is presented in this paper. The resonator consists of a fully differential high-Q active inductor with resonating passive capacitors. The realisation of the active inductor has no critical passive components, which reduces size and sensitivity, and extends the number of possible process technologies. On the other hand, the inherently poor noise properties of active inductors are discussed. The tuning range of the resonator is 2.5-3 GHz with freely adjustable quality factor. A second-order filter with the same tuning range and -3 dB bandwidth of 50 MHz is also described
Keywords :
Q-factor; active filters; bipolar MMIC; circuit tuning; elemental semiconductors; inductors; microwave filters; silicon; 2.5 to 3 GHz; 50 MHz; BJT active resonator; Si; active filter; freely adjustable quality factor; fully differential high-Q active inductor; noise properties; process technologies; resonating passive capacitors; second-order filter; tuning range; Active filters; Active inductors; Active noise reduction; Band pass filters; Circuits; Gyrators; Impedance; Inductance; Microwave filters; Resonator filters;
Conference_Titel :
Electronics, Circuits and Systems, 1998 IEEE International Conference on
Conference_Location :
Lisboa
Print_ISBN :
0-7803-5008-1
DOI :
10.1109/ICECS.1998.813966
