A HIGH-Q TIME-VARIANT BANDPASS FILTER
B Ab Alhasani, Mehdi Hosseini · Iranian journal of electrical and computer engineering · 2006
A high-Q time-variant (TV) band-pass filter (BPF) is analyzed in this paper. N parallel identical low-pass RC filters make this BPF, in which each of these N filters is sequentially switched on for an equal time interval, periodically. The resulting BPF provides a stable frequency response and is insensitive to element variations. Through mathematical analysis, equations are derived for the frequency response and the bandwidth of the BPF. Moreover, the validity of these equations is confirmed by experimental results. These equations make the design of the above high-Q BPF an easy task.