Frequency Response of Electronically Tunable Current-Mode Third Order High Pass and Low Pass Filter for Q = 10

The circuits using current-mode (CM) building blocks have received considerable attention in many filtering and signal processing applications. Compared to their voltage-mode(VM) counterparts, the are attractive because of wider bandwidth, higher slew rate, lower power consumptions. In IC technology, it is desirable operate at low voltages which can be achieved by CM blocks. As a large number op-amp based with elegant realization procedures already available, worthwhile convert them into on this paper, current mode third order high pass filter described. proposed circuit employs operational amplifier as basic unit. realizes quadratic work function. It provides electronically tuning capability characteristics. works ideal for Center frequency fo= 10 k Circuit merit factor Q > 1. gain roll-off configuration 18dB/octave. suitable monolithic integration operation. filters developed were successful obtaining passive sensitivities less than unity magnitude active half magnitude, noteworthy achievement. operation integration.