Bi-directional Band pass / Band stop filter based on Current-Starved Pseudo Floating-Gate inverters

In this paper a bi-directional band pass/band stop filter is presented. The circuit takes advantage of capacitive coupling and uses Current-Starved Pseudo Floating-Gate (CSPFG) inverters to perform the bi-directional frequency selection. Simply by Changing a bias voltage from vdd to gnd or vice versa the circuit changes directionality and operation mode. Typical applications are detection of high frequency components sensory signals, where a 2 way communication is needed. AC simulation of the circuits are presented to show that these circuits are suited for high performance filter design.