Patent ID: 11881275
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A built-in self test (BIST) system for screening a memory cell including a first bitline, a second bitline and a wordline, the BIST system comprising:
margin control circuitry configured to provide a modulated bitline voltage to at least one of the first bitline and the second bitline, wherein the modulated bitline voltage is different from a nominal bitline voltage of the memory cell;
a write/read control generator configured to write a write value to the memory cell using the modulated bitline voltage, and read the memory cell to obtain a read value;
a comparator configured to compare the read value to the write value; and
a control engine coupled to, and configured to control, each of the margin control circuitry, the write/read control generator, and the comparator.