Memory Cell Line Switching to Cut Idle Bit Line Power

The bit line system is segmented into multiple independent bit line groups, each可控 by its own switch. This allows selective activation of only the bit line groups needed for the current operation, rather than activating all bit lines. The segmentation enables granular control over which memory cell columns are accessed, reducing the number of active bit lines and thus lowering power consumption while maintaining full data transmission capability when needed.

The patent introduces dynamic control mechanisms (switches controlled by column word lines and byte enable signals) that adaptively configure which bit lines are active based on the specific read/write operation being performed. This dynamic reconfiguration allows the system to optimize power consumption for each operation by activating only the necessary bit lines, while maintaining the capability to activate all bit lines when full bandwidth is required.

The column word lines serve multiple functions: they select specific memory cell columns for access and simultaneously control the switches that connect those columns to bit lines. This multi-functionality reduces the need for separate control lines for each switch, as the column word lines themselves provide the control signals. The byte enable signals provide additional multi-functional control by enabling or disabling entire groups of bit lines based on operational requirements.

The patent merges the column selection function with the bit line switch control function by using the same column word lines to control both. Instead of having separate control lines for switch activation, the column word line signals are reused to control the switches, combining multiple control functions into a single signal path and reducing overall control line complexity.