Intel Corporation

Harishankar Sahu

Gururaj Shamanna

Abhishek A Sharma

Naveen Kumar M

Jagadeesh Chandra Salaka

Mitesh Goyal

Purna C Nayak

Abhishek Chouksey

Madhusudan Rao

An integrated clock gate (ICG) includes an OR-AND-INVERT gate to receive a first enable and a second enable; a first inverter coupled to the output of the OR-AND-INVERT; a first NAND gate coupled to the output of the first inverter; a second NAND gate coupled to the output of the OR-AND-INVERT; and a second inverter to provide a clock which is gated based on logic values of the first enable and/or the second enable, wherein an output of the second inverter is received as input by the OR-AND-INVERT-gate. The ICG circuit reduces capacitance of input clk pin, which translates to lower switching power when clock is gated and reduction in dynamic power of clock network, since buffers in clock tree driving the ICG cells can be downsized. The ICG cell has the smallest transistor count (and area) when compared to existing ICG cell topologies.

Keeper-free integrated clock gate circuit

A clock gate circuit (CGC) is described that optimizes dynamic power of the CGC when clock is gated. The CGC helps in dynamic power reduction of clock network by offering lower clock pin capacitance and also by providing clock pin driver downsizing opportunities. Switching power, and hence, dynamic power is reduced when load on the input clock pin is reduced. Further, dynamic power of the clock network also reduces by downsizing the clock buffers, which drive the CGC clock pins.

Low power clock gate circuit

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Bengaluru, India

Harishankar Sahu