Patent ID: 11962312
Assignee: NVIDIA CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 22:
23. A method of operating a glitch detection circuit comprising an oscillator, a sampling circuit, and digital logic for controlling the oscillator, the method of operating the glitch detection circuit comprising a plurality of operations comprising:
generating, by the oscillator, multiple local clocks of multiple different phases;
oversampling, by the sampling circuit using the multiple local clocks, a system clock to generate multiple samples of the system clock;
monitoring, by a glitch detector of the digital logic, a variation in pulse width of the system clock based on counting the multiple samples;
reporting, by the glitch detector, a glitch in response to detecting a variation in the pulse width that exceeds a threshold value; and
variably adjusting, by a loop filter of the digital logic, the oscillator based on a frequency of each of the multiple samples to control an output frequency of each of the multiple different phases of the oscillator.