Patent attributes
A complex band-pass filter. The complex band-pass filter includes a band-pass filter coupled to a voltage source. The band-pass filter includes a first plurality of transconductors that receives a first voltage, where the first voltage controls the center frequency of the band-pass filter. The band-pass filter also includes a second plurality of transconductors, wherein the second plurality of transconductors receives a second voltage, where the second voltage controls the bandwidth of the band-pass filter. According to the system disclosed herein, the complex band-pass filter has automatic frequency tuning against process variations, a programmable center frequency, and a programmable bandwidth. Providing programmability to the center frequency (Fc) and bandwidth (BW) offers an alternative for multi-protected standards with different channels (Fc changes) and for time acquisition improvements (BS changes).
