Clock gating

About: Clock gating is a research topic. Over the lifetime, 7838 publications have been published within this topic receiving 107903 citations.

Computer system controlling memory clock signal and method for controlling the same

Abstract: A computer system controlling memory clock signals of a DIMM (dual in-line memory module) socket includes a processor controlling a 66 MHz or a 100 MHz system bus clock signal to be generated, a DIMM memory module supporting the 66 MHz or the 100 MHz system bus clock signal, a clock generator generating the 66 MHz or the 100 MHz system bus clock signal according to control signals from of the processor, a clock buffer, and first and second system controllers. The clock generator and the clock buffer store setting data according to memory data of a memory module from a first system controller. The first and the second system controllers control memory bus clock signals corresponding to an inserted single-sided type or double-sided type DIMM memory module. As a result, clock signals to an unused memory module socket are disabled or unused clock signals of a memory module socket in use are cut off in response to detection of the kind of an inserted memory module.

Clock gating system and method

Abstract: A clock gating system and method is disclosed. In a particular embodiment, the system includes an input logic circuit having at least one input to receive at least one input signal and having an output at an internal enable node. A keeper circuit includes at least one switching element that is responsive to a gated clock signal and is coupled to the internal enable node to selectively hold a logical voltage level at the internal enable node. The system further includes a gating element responsive to an input clock signal and to the logical voltage level at the internal enable node to generate the gated clock signal.

Method and apparatus for optimizing a gated clock structure using a standard optimization tool

Abstract: A method and apparatus for using an optimization tool to optimize a design that uses a gated clock structure. In short, the present invention allows a standard optimizer tool to determine the relative timing of two or more signals that arrive at a logic gate, wherein the logic gate forms a gated clock signal. Typically, standard optimizer tools can only check the relative timing between two or more signals that arrive at a storage element. In accordance with the present invention, selected logic gates may be modeled as a storage element. Thus, a standard optimizer tool may be used to correctly optimize a design that uses a gated clock structure, and in particular, to correctly optimize the logic that provides the clock and enable signals to a clock gating element.

Clock synchronous semiconductor memory device having current consumption reduced

Abstract: A synchronous semiconductor memory device includes a clock pulse generator generating internal first and second clock pulses in synchronization with an external clock signal for application, respectively, to a word line select decoder selecting a row of memory cells, and to a bit line select decoder selecting a column of memory cells, a sense amplifier sensing and amplifying a data of selected memory cell and a write driver writing a data to the selected memory cell. Word line select decoder is enabled when the first clock pulse is active, and bit line select decoder, sense amplifier and write driver are activated when the second clock pulse is active. These circuits are activated only for a necessary minimum period, and current consumption is reduced.

Reducing clock skew in clock gating circuits

Abstract: One embodiment of the present invention includes a technique for a gated clock conversion for a circuit which includes a gating circuit and a sequential element. The gating circuit has a gated clock net that drives a clock input of the sequential element. The sequential element receives a first input net at a data input and generates an output net. The gating circuit has a user-defined clock net. The technique includes determining the gating circuit and transforming the gating circuit to provide a second input net to the sequential element based on a cofactor condition of the gating circuit.