ABSTRACT
This chapter focuses on clock-powered logic, which is a systematic approach for designing overall energy-efficient Complementary Metal Oxide Semiconductor very large scale integration systems that use adiabatic charging and energy recovery (E-R). Clock-powered logic is a node-selective adiabatic approach, in which energy recovery through adiabatic charging is applied to only those nodes that are deemed to be large capacitance. The chapter reviews clock-powered logic followed by a presentation of ac supply sources that can be used for adiabatic charging. It describes in detail how adiabatically-charged nodes interface with logic blocks powered from a dc supply voltage. Precharged logic works straightforwardly with clock-powered signals. The E-R latch design used with precharged logic can operate with pass-transistor logic as well. The chapter shows how clock-powered microsystems can be built, investigates timing implications for the various styles of clock-powered logic, and discusses the energy dissipation of clock-powered microsystems.
