Certain class of logic circuits
called adiabatic logic deals
the probability of further decreasing the energy dissipated during the
switching activity, and the possibility of reusing or recycling, some amount of
the energy drawn from the power supply. To undertake this goal, the circuit
topology and the operation principles should have to be modified, sometimes
significantly. The amount of energy recycling achievable using adiabatic
techniques is also determined by the fabrication technology, the voltage swing
and switching speed.

List of adiabatic logic families in approximate
chronological order

1. Recovered energy logic (REL)

2. Charge recovery logic (CRL)

3. Split level charge recovery logic
(SCRL)

4. Adiabatic dynamic logic (ADL)

5. Clocked adiabatic logic (CAL)

6. Improved clocked adiabatic logic
(ICAL)

7. Efficient charge recovery logic
(ECRL)

8. 2N-2N2P adiabatic logic

9. Positive feedback adiabatic logic
(PFAL)

10. Charge recycling differential
logic (CRDL)

11. Half rail differential logic
(HRDL)

12. Pass transistor adiabatic logic
(PAL)

13. Quasi static energy recovery
logic (QSERL)

14. NMOS energy recovery logic (NERL)

15. Bootstrapped charge recovery
logic (BCRL)

16. High efficient energy recovery logic (HERL)

Out of these, there are four families such as ECRL, 2N-2N2P, CAL and
ICAL that gives a clarification for the goodness of such circuts in terms of Energy Saving Factors, Static Power Dissipation and Delay: (Under 180 nm Technogy)

Adiabatic
type

ESF

CAL with
ICAL

1.075

CAL with
2N-2N2P

1.071

ECRL with
CAL

2.570

2N-2N2P with
ICAL

1.008

Adiabatic Types

Static power
Dissipation

CAL

49.08 pW

ICAL

2.4 µW

2N-2N2P

32.2 pW

ECRL

33.0 µW

Voltage (V)

CAL XOR (ns)

ICAL XOR (ns)

2N-2N2P XOR (ns)

0.9

0.69

0.15

1.95

1.0

0.65

0.62

1.83

1.2

0.61

0.58

1.72

1.3

0.59

0.57

1.69