Patent ID: 11862233
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 11:
12. A system for detecting a mismatch of a sense amplifier, comprising:
a data acquisition circuit configured to acquire a test data set;
a data conversion circuit configured to convert the test data set into a first voltage difference between a bit line and a reference bit line, input the first voltage difference to a sense amplifier in which a positive channel-metal-oxide-semiconductor (PMOS) transistor or a negative channel-metal-oxide-semiconductor (NMOS) transistor is delayed to be switched on for precharge for a preset time, with the preset time is less than a standard precharge command period, and amplify a second voltage difference between the bit line and the reference bit line obtained after the precharge by the sense amplifier to obtain a voltage difference to be tested; and
a mismatch detection circuit configured to compare the voltage difference to be tested with a preset voltage difference to be tested, and determine that a mismatch occurs in the sense amplifier when the voltage difference to be tested and the preset voltage difference to be tested are in a same direction.