![clock gating for negative edge triggered flip flop clock gating for negative edge triggered flip flop](https://www.zeepedia.com/depository/9/ch25/9-25_files/9-2500004im.jpg)
An Overview of Quasi-Static Energy Recovery Logic (QSERL) This paper presents clock gating flip-flops using single-phase quasi-static energy recovery scheme. It is reported that, previously described clock gating adiabatic flip-flop was designed using the multi-phase clock schemes. Several clock gating schemes for adiabatic circuits have been proposed and achieved considerable energy savings. Similar to power gating and clock gating techniques of conventional CMOS circuits, the energy loss can be reduced during idle periods of adiabatic units by switching off their power clocks. However, in adiabatic circuits, energy dissipation occurs even if the input signals are not being switched since their output nodes are always charged and discharged by power clock.
#Clock gating for negative edge triggered flip flop generator#
This technique detaches the clock generator circuit from the logical circuit when circuit is in idle mode. The clock gating is most efficient way to reduce power dissipation in clocked logic circuits.
![clock gating for negative edge triggered flip flop clock gating for negative edge triggered flip flop](https://instrumentationtools.com/wp-content/uploads/2017/12/circuit-for-producing-a-clock-pulse.png)
In adiabatic or energy recovery logic, the clock generator circuit continuously provides clock signal resulting in dynamic power dissipation. The static CMOS circuit shows negligible dynamic power loss as long as input signal does not switch. The problems of multi-phase clocking adiabatic circuits include the issues such as: clock skew, complicated power clock tree and multiple power clock generators, which results in extra area overhead and increases the hardware complexity. The previously reported adiabatic circuits demand mostly multi-phase power clocks. The power dissipation is reduced by maintaining a very low potential difference across the two terminals of a turn-on MOS device. This recycling is achieved by using an AC power source instead of the constant DC power source. An adiabatic switching technique reduces the dynamic power dissipation by recycling the charge stored in the node capacitance. Different charging and discharging paths cause the energy to be dissipation in the form of heat. The dynamic power dissipation in a circuit is due to charging and discharging of output node capacitance(s).
![clock gating for negative edge triggered flip flop clock gating for negative edge triggered flip flop](https://i.stack.imgur.com/CzI2j.png)
In order to minimize the power dissipation, research at various levels of design is going on which reports ultra low power dissipation with optimum performance. Introduction As the density and operating speed of CMOS chips increases, the power dissipation becomes a critical concern.