Semiconductor device including monitoring circuit

A semiconductor device comprising:

• a first monitoring circuit that includes a plurality of first delay cells, which are coupled in series to each other, each including a first pull-up transistor and a first pull-down transistor coupled in series to each other, and performs a monitoring operation based on a first enable signal;
• a second monitoring circuit that includes a plurality of second delay cells, which are coupled in series to each other, each including a second pull-up transistor and a second pull-down transistor coupled in series to each other, and performs a monitoring operation based on a second enable signal;
• a first coupling circuit that is turned on to couple each input terminal of the first delay cells with a gate of the first pull-up transistor, and adjusts a turned-on level thereof based on the first enable signal;
• and
• a second coupling circuit that is turned on to couple each input terminal of the second delay cells with a gate of the second pull-down transistor, and adjusts a turned on level thereof based on the second enable signal,
• wherein each of the first and second coupling circuits includes a transmission gate which is fully turned on when the first enable signal is deactivated as compared with when the first enable signal is activated.

A semiconductor device comprising:

• a monitoring circuit that includes a plurality of delay cells, which are coupled in series to each other, each including a pull-up transistor and a pull-down transistor coupled in series to each other, and performs a monitoring operation based on an enable signal;
• a first coupling circuit that is turned on to couple each input terminal of the delay cells with a gate of the pull-up transistor, and adjusts a turned-on level thereof based on a first control signal;
• a second coupling circuit that is turned on to couple each input terminal of the delay cells with a gate of the pull-down transistor, and adjusts a turned-on level thereof based on a second control signal;
• and
• a control signal generation circuit that activates the first control signal or the second control signal based on a mode signal when the enable signal is activated, and deactivates the first control signal or the second control signal when the enable signal is deactivated,
• wherein each of the first and second coupling circuits includes a transmission gate which is fully turned on when the first control signal is deactivated as compared with when the first control signal is activated.

A semiconductor device comprising:

• a plurality of delay cells coupled in series to each other, each including a pull-up transistor a pull-down transistor coupled in series to each other;
• a monitoring control circuit that controls the delay cells to perform a monitoring operation based on an enable signal;
• and
• a coupling circuit that is turned on to couple, each input terminal of the delay cells with a gate of the pull-up transistor or pull-down transistor, and maintains a turned-on state, wherein the monitoring control circuit inverts an output of a delay cell disposed at a last terminal among the delay cells and provides an inverted signal to an input terminal of a delay cell disposed at a first terminal when the enable signal is activated.