Memory Word-line Tracking Scheme

A word-line tracking system for a static random access memory (SRAM) cell array having a plurality of SRAM cells, the word-line tracking system comprising:

• a dummy row of the memory cells having substantially identical structure as one or more regular rows of the memory cells, the dummy row including a dummy word-line having a first and a second end at the opposite longitudinal ends of the dummy word-line, the first end being connected to a word-line driver;
• a self timing generator configured to receive a clock signal and generate a pulse signal in sync with the clock signal for the dummy word-line driver, the self timing generator having a first terminal for receiving a feedback signal and operative to determine the falling edge of the pulse signal;
• a voltage-to-current converter connected to the second end of the dummy word-line;
• a current-to-voltage converter connected to the first terminal;
• and
• a wire connecting the voltage-to-current converter to the current-to-voltage converter.

A word-line tracking system for a dynamic random access memory (DRAM) cell array having a plurality of DRAM cells, the word-line tracking system comprising:

• a dummy row of the memory cells having substantially identical structure as one or more regular rows of the memory cells, the dummy row including a dummy word-line having a first and a second end at the opposite longitudinal ends of the dummy word-line, the first end being connected to a word-line driver;
• a self timing generator configured to receive a clock signal and generate a pulse signal in sync with the clock signal for the dummy word-line driver, the self timing generator having a first terminal for receiving a feedback signal and operative to determine the falling edge of the pulse signal;
• a voltage-to-current converter connected to the second end of the dummy word-line;
• a current-to-voltage converter connected to the first terminal;
• and
• a wire connecting the voltage-to-current converter to the current-to-voltage converter.