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US 12,736,400 B2Granted
Laser detector capable of detecting a laser signal according to a transient voltage fluctuation
AssigneeUnited Microelectronics Corp.
InventorsKun-Yuan Wu, Chen-Hsien Hsu, Wei-Jen Wang, Chien-Fu Chen, Ruei-Yau Chen, Cheng-Yang Tsai
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Abstract
A laser detector includes a delay chain circuit and a warning circuit. The warning circuit is coupled to the delay chain circuit for generating a warning signal. The delay chain circuit includes N inverters coupled in series, an input terminal configured to receive an input voltage to the N inverters, and an output terminal configured to output an output voltage generated by the N inverters. N is a positive integer.
Claims18
A laser detector comprising:
- a delay chain circuit, comprising:
- N inverters coupled in series;
- an input terminal configured to receive an input voltage to the N inverters;
- and
- an output terminal configured to output an output voltage generated by the N inverters;
- a NAND gate comprising:
- a first input terminal coupled to the output terminal of the delay chain circuit;
- a second input terminal configured to receive a reset signal;
- and
- an output terminal coupled to the input terminal of the delay chain circuit;
- and
- a warning circuit coupled to the output terminal of the NAND gate and configured to generate a warning signal;
- wherein N is a positive integer.
10 more elements
Dependencies are inferred from the claim text.