Patent ID: 11929610
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. An electrostatic discharge method configured for electrostatic discharge by means of an electrostatic discharge (ESD) protection circuit, wherein the ESD protection circuit comprises:
a pulse detection unit configured to detect an electrostatic pulse, a first terminal of the pulse detection unit being connected to a first pad, a second terminal of the pulse detection unit being connected to a second pad, and an output terminal of the pulse detection unit being configured to output a detection result signal;
a discharge transistor, a gate of the discharge transistor being connected to the output terminal of the pulse detection unit, a drain of the discharge transistor being connected to the first pad, a source of the discharge transistor being connected to the second pad, and the discharge transistor being configured to discharge an electrostatic charge when an ESD event occurs in the first pad or the second pad;
a feedback delay unit, configured to extend an on period of the discharge transistor when the discharge transistor discharges the electrostatic charge; wherein the feedback delay unit comprises: a P-channel metal oxide semiconductor (PMOS) transistor, a source of the PMOS transistor being connected to the first pad, and a gate of the PMOS transistor being connected to the output terminal of the pulse detection unit; and an N-channel metal oxide semiconductor (NMOS) transistor, a source of the NMOS transistor being connected to the second pad, a drain of the NMOS transistor being connected to the output terminal of the pulse detection unit, and a gate of the NMOS transistor being connected to a drain of the PMOS transistor;
and
a processing unit, respectively connected to the output terminal of the pulse detection unit and the feedback delay unit, the processing unit being configured to control ON and OFF of the feedback delay unit according to the detection result signal;
wherein the electrostatic discharge method comprises:
providing a discharge transistor, the discharge transistor being respectively connected to a first region and a second region in need of electrostatic discharge protection;
controlling the discharge transistor to be enabled when a surface of the first region and a surface of the second region have an electrostatic charge; and
controlling the discharge transistor to be disabled when there is no need for electrostatic discharge.