17-09-2015 дата публикации
Номер: US20150262994A1
Принадлежит:
A surge-protection circuit for a chip is provided. The surge-protection circuit includes a detection element and a protection element. The detection element is embedded on the chip and arranged between a first terminal and a second terminal, and the detection element is utilized to detect whether an abrupt voltage variation occurs due to a surge or not and generate an enabling signal when the abrupt voltage variation occurs. The protection element is embedded on the chip and coupled to the detection element, and the protection element is utilized to adjust and reduce the abrupt voltage variation through bypassing high energy generated by the surge after receiving the enabling signal. 1. A surge-protection circuit for a chip , comprising:a detection element, embedded on the chip and arranged between a first terminal and a second terminal, utilized to detect whether or not an abrupt voltage variation occurs due to a surge and to generate an enabling signal when the abrupt voltage variation occurs; anda protection element, embedded on the chip and coupled to the detection element, utilized to adjust and reduce the abrupt voltage variation by bypassing high energy generated by the surge after receiving the enabling signal.2. The surge-protection circuit as claimed in claim 1 , wherein the first terminal and the second terminal are transmission outputs of the chip.3. The surge-protection circuit as claimed in claim 1 , wherein the first terminal and the second terminal are a receiving input and a ground of the chip.4. The surge-protection circuit as claimed in claim 1 , wherein the detection element further comprises a differential pair composed of two P-type transistors claim 1 , sources of the two P-type transistors are coupled to the first terminal and the second terminal respectively claim 1 , and drains of the two P-type transistors are coupled together claim 1 , and gates of the two P-type transistors are biased to a pre-determined voltage claim 1 , and when the ...
Подробнее