This paper proposes a KHN equivalent biquad using third generation current conveyor (CCIII). The proposed current mode filter circuit is derived from the adjoint signal flow graph corresponding to the classical KHN filter. The proposed multi-input and single-output biquad offers all the advantages of KHN biquad. The derived circuit can realize all the five responses (Low pass, High Pass, Band pass, All pass and Band stop) without the need of any additional active/passive component. To validate the circuit workability software simulations have been done using PSPICE. Non-ideal analysis and sensitivity analysis of the filter circuit is also shown in this paper.