On-chip TDDB degradation monitoring and failure early warning circuit for SoC

An on-chip TDDB degradation monitoring and failure early warning circuit for SoC, comprising:

• a timing logic module (100), a control circuit module (200), a digital conversion module for TDDB performance degradation (300), an output selection module (400) and a counter module (500), wherein the counter module (500) includes a counter A and a counter B;
• the digital conversion module for TDDB performance degradation (300) includes two same MOS transistor circuits including a first MOS transistor circuit and a second MOS transistor circuit;
• the timing logic module (100) includes X, Y and CP signal input terminals and Q1 and Q0 output terminals, and the timing logic module is configured to output the Q1 and Q0 signals with a high or low level voltage to the control circuit module (200) under control of input X, Y and CP signals;
• the control circuit module (200) is configured to convert the Q1 and Q0 signals into a switch state control signal and outputs the switch state control signal to the digital conversion module for TDDB performance degradation (300);
• a MOS transistor of the first MOS transistor circuit is in a stress state of the supply voltage and a MOS transistor of the second MOS transistor circuit is in a non-stress state within the digital conversion module for TDDB performance degradation (300);
• the first and the second MOS transistor circuits output a first and second frequency value to the output selection module (400) respectively, under control of the switch state control signal;
• the output selection module (400) is configured to output the first frequency value from the digital conversion module for TDDB performance degradation (300) to the counter B for recording, or output the second frequency value from the digital conversion module for TDDB performance degradation to the counter A for recording;
• and
• the counter module (500) is configured to determine a degradation level of TDDB performance by comparing the first frequency value with the second frequency value.