High-performance and low-power are the two main criteria in modern digital design. Level converters are important to transfer low voltage input swing signal among the circuits operating at different voltages to get high voltage output swing signal. Previously feedback level converters suffer from short circuit power and long propagation delay. Multi Vth level converters and multiple supply voltages assignment are used to reduce the power dissipation, propagation delay. The blocks operate at high speed utilizes high supply voltages and blocks operate at low speed utilizes lower supply voltage. To interface these blocks, level converters can be used. Based on this survey a new low power and high performance level converters are proposed.

1. K. Usami et al., “Automated low-power technique exploiting multiple supply voltages applied to a media processor,” IEEE J. Solid State Circuits., vol. 33, pp. 463-471, Mar. 1998.
2. S. H. Kulkarni and D. Sylvester, “High performance level conversion for dual VDD design,” IEEE Trans. Very large scale Integr. (VLSI) syst., vol. 12, no. 9, pp. 926-936, Sep. 2004.
3. A. srinivasa and D. Sylvester, “Minimizing total power by simultaneous Vdd/Vth Assignment,” in Proc. IEEE Des. Autom. Conf., Jan. 2003, pp. 400-403.
4. S. H. Kulkarni, A. N. Srivastava and D. Sylvester, “A new algorithm for improved VDD assignment in low power dual VDD systems,” in Proc. IEEE Int. Symp. Low Power Electron. Des., Aug. 2004, pp. 200-205.
5. F. Ishihara, F. Sheikh and B. Nikolic, “Level conversion for dual supply systems,” IEEE Trans. Very large Scale Integr. (VLSI) Syst., vol. 12, no. 2, pp. 185-195, Feb. 2004.
6. V. Kursun, R. M. Secareanu and E. G. Friedman, “CMOS voltage interface circuit for low power systems,’ in Proc. IEEE Int. Symp. Circuits syst., May. 2002, vol. 3, pp. 667-670.

High-performance multiple supply voltages multiple threshold voltages parameter variations power efficiency voltage level converters