Patent ID: 11915632
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 10:
11. A signal processing device comprising:
a first logic circuit configured to process a first voltage range among voltage levels of input signals;
a second logic circuit configured to process a second voltage range higher than the first voltage range among the voltage levels of the input signals; and
a protection control circuit disposed between the first logic circuit and the second logic circuit and including a protection switch and a protection controller for controlling the protection switch,
wherein the voltage levels of the input signals are greater than an internal allowable voltage level, and the protection switch is turned on when the protection controller is turned off or powered down, and
wherein the protection switch is turned on when operation power for operating the second logic circuit is applied and the operation power is not applied to the protection controller.