I am Manzil Duarah a B.E final year student. My seminar topic for my final semester is " A very linear low pass filter with automatic frequency tuning". I don't have the necessary documents for making the seminar report. So i wanted the full text document on this topic. So i would be very thankful if you help me out.
The abstract of the topic is as follows :
Abstract—A Gm-C third-order Chebyshev low-pass filter with a novel
switched capacitor frequency tuning technique for a zero-IF Bluetooth receiver
has been designed. The frequency tuning scheme is simpler and has
more relaxed specifications than conventional ones. Furthermore, a highly
linear pseudo-differential transconductor with a compact feedback loop
able to operate with low supply voltage has been used. This control loop
holds the input transistors in triode region and provides high output resistance,
keeping high linearity in a wide range of transconductance. The
filter bandwidth is 0.5MHz and the overall scheme consumes 1.1 mA from
a 1.8-V supply. The measured third-order intermodulation (IM3) distortion
of the filter for a 1 Vpp two-tone signal centered at 300 kHz is 65 dB.
Index Terms—Analog CMOS circuits, direct-conversion receivers, frequency
tuning, Gm-C filters, linear transconductors.