Power-Clock Gating in adiabatic logic circuits

Abstract

For static CMOS Clock-Gating is a well-known method to decrease dynamic losses. In order to reduce the static power consumption caused by leakage currents, Power-Gating has been introduced. This paper presents for the first time Clock-Gating and Power-Gating in Adiabatic Logic. As the oscillator signal is both the power and the clock in Adiabatic Logic, a Power-Clock Gating is implemented using a switch to detach the adiabatic logic block from the oscillator. Depending on the technology the optimum switch topology and dimension is discussed. This paper shows that a boosted n-channel MOSFET as well as a transmission gate are good choices as a switch. Adiabatic losses are reduced greatly by shutting down idle adiabatic circuit blocks with Power-Clock Gating. © Springer-Verlag Berlin Heidelberg 2005.