A new current mode logic style with feedback for digital applications

In this paper, a new logic style named as MOS current mode logic with feedback is proposed as an alternative to conventional MOS current mode logic for implementing digital circuits operating at high frequencies. The proposed circuit style employs a positive feedback that enhances the switching speed of the circuit. The use of feedback reduces the number of transistors needed to implement the circuit in comparison to conventional MOS current mode logic. Different circuits based on MOS current mode logic with feedback are proposed and simulated in PSPICE using 0.18μm CMOS technology parameters. Their performance comparison with CMOS and conventional MCML circuits indicates that the proposed circuits have lesser number of transistors with minimum propagation delay values.