Electrostatic discharge circuit and electrostatic discharge control system
An electrostatic discharge circuit may include a control voltage generation circuit, an electrostatic detection circuit, a driving control circuit and a discharge driving circuit. The control voltage generation circuit may generate first to third control voltages through a division operation on a supply voltage. The electrostatic detection circuit may set a first setup voltage based on the first control voltage, and detect static electricity transferred through the first setup voltage. The driving control circuit may set a second setup voltage based on the second control voltage, and generate a driving control signal. The discharge driving circuit may set a third setup voltage based on the third control voltage, and perform a discharge operation on static electricity.
1. An electrostatic discharge circuit, comprising:
a control voltage generation circuit configured to generate a first control voltage, a second control voltage, and a third control voltage by dividing a supply voltage;
an electrostatic detection circuit configured to set a first setup voltage based on the first control voltage, and generate an electrostatic detection signal by detecting static electricity included in the first setup voltage;
a driving control circuit configured to set a second setup voltage in response to the second control voltage, and generate a driving control signal based on the electrostatic detection signal; and
a discharge driving circuit configured to set a third setup voltage based on the third control voltage, and perform a discharge operation on static electricity included in the third setup voltage based on the driving control signal.
2. The electrostatic discharge circuit according to claim 1 , wherein one or more of the first to third control voltages have different voltage levels.
3. The electrostatic discharge circuit according to claim 1 , wherein the first to third control voltages have voltage levels sequentially decreasing from a voltage level of the supply voltage.
4. The electrostatic discharge circuit according to claim 1 , wherein the electrostatic detection circuit comprises:
a first setup circuit configured to receive the supply voltage and generate the first setup voltage based on the first control voltage.
5. The electrostatic discharge circuit according to claim 1 , wherein the driving control circuit comprises:
a second setup circuit configured to receive the supply voltage and generate the second setup voltage based on the second control voltage.
6. The electrostatic discharge circuit according to claim 1 , wherein the discharge driving circuit comprises:
a third setup circuit configured to receive the supply voltage and generate the third setup voltage based on the third control voltage.
7. The electrostatic discharge circuit according to claim 1 , wherein the electrostatic detection circuit comprises a first low voltage transistor configured to receive the first control voltage.
8. The electrostatic discharge circuit according to claim 1 , further comprising a reverse discharge circuit configured to discharge static electricity included in a ground voltage to the supply voltage.
9. The electrostatic discharge circuit according to claim 1 , wherein the electrostatic detection circuit comprises:
a detection circuit configured to detect the static electricity included in the first setup voltage and output the electrostatic detection signal.
10. The electrostatic discharge circuit according to claim 1 , wherein the driving control circuit comprises a driving circuit configured to generate the driving control signal based on the electrostatic detection signal.
11. The electrostatic discharge circuit according to claim 1 , wherein the discharge driving circuit comprises a discharge circuit configured to form a discharge path for the third setup voltage based on the driving control signal.
12. The electrostatic discharge circuit according to claim 1 , wherein the driving control circuit comprises a second low voltage transistor configured to receive the second control voltage, and a third low voltage transistor configured to receive the electrostatic detection signal.
13. The electrostatic discharge circuit according to claim 1 , wherein the discharge driving circuit comprises a fourth low voltage transistor configured to receive the third control voltage, and a fifth low voltage transistor configured to receive the driving control signal.
14. An electrostatic discharge circuit, comprising:
a bias generation circuit configured to generate a bias voltage;
an electrostatic sensing circuit configured to sense static electricity present in a supply voltage and generate a driving control signal; and
a discharge driving circuit configured to set a setup voltage based on the bias voltage, and perform a discharge operation on static electricity present in the setup voltage based on the driving control signal.
15. The electrostatic discharge circuit according to claim 14 , wherein the electrostatic sensing circuit comprises:
an electrostatic detection circuit configured to detect the static electricity present in the supply voltage and generate an electrostatic detection signal.
16. The electrostatic discharge circuit according to claim 15 , wherein the electrostatic detection circuit comprises:
a first setup circuit configured to receive the supply voltage and generate a first setup voltage based on the bias voltage.
17. The electrostatic discharge circuit according to claim 15 , wherein the electrostatic detection circuit comprises:
a detection circuit configured to detect static electricity present in a first setup voltage and output the electrostatic detection signal.
18. The electrostatic discharge circuit according to claim 14 , wherein the electrostatic sensing circuit comprises:
a driving control circuit configured to generate the driving control signal based on an electrostatic detection signal.
19. The electrostatic discharge circuit according to claim 18 , wherein the driving control circuit comprises:
a second setup circuit configured to receive the supply voltage and generate a second setup voltage based on the bias voltage.
20. The electrostatic discharge circuit according to claim 18 , wherein the driving control circuit comprises:
a driving circuit configured to generate the driving control signal based on the electrostatic detection signal.
21. The electrostatic discharge circuit according to claim 14 , wherein the bias generation circuit is configured to generate the bias voltage by dividing the supply voltage.
22. The electrostatic discharge circuit according to claim 14 , wherein the discharge driving circuit comprises:
a setup circuit configured to receive the supply voltage and generate the setup voltage based on the bias voltage.
23. The electrostatic discharge circuit according to claim 14 , wherein the discharge driving circuit comprises:
a discharge circuit configured to form a discharge path for the setup voltage based on the driving control signal.
24. The electrostatic discharge circuit according to claim 14 , wherein the discharge driving circuit comprises:
a first low voltage transistor configured to receive the bias voltage.
25. The electrostatic discharge circuit according to claim 14 , wherein the discharge driving circuit comprises:
a second low voltage transistor configured to receive the driving control signal.
26. The electrostatic discharge circuit according to claim 14 , further comprising a reverse discharge circuit configured to discharge static electricity present in a ground voltage to the supply voltage.