Protection unit, ADC module and system
AssigneeABB Schweiz AG
InventorsYongfei Qu, Huan Shi, Wei Liu, Jie Yuan
Life of this patent
Estimating the term…
Abstract
Embodiments of present disclosure relate to a protection unit, an ADC module, and a system. The protection unit includes a first terminal; a second terminal; a first switch unit disposed between the first terminal and an output terminal of the protection unit; a second switch unit disposed between the second terminal and a ground of the protection unit; and a positive over voltage protection unit coupled to the first terminal, the first switch unit, and the second switch unit. The protection unit is configured to switch off the first switch unit and the second switch unit when a positive voltage at the first terminal exceeds a positive threshold.
Claims20
A protection unit, comprising:
- a first switch unit disposed between a first terminal and an output terminal of the protection unit;
- a second switch unit disposed between a second terminal and a ground of the protection unit;
- and
- a positive over voltage protection unit coupled to the first terminal, the first switch unit, and the second switch unit, and configured to switch off the first switch unit and the second switch unit when a positive voltage at the first terminal exceeds a positive threshold, wherein:
- the positive over voltage protection unit including a first PNP transistor, a first NPN transistor, a first MOSFET, and a second MOSFET, and
- a collector of the first NPN transistor is coupled to a gate of the first MOSFET and a gate of the second MOSFET and an emitter of the first NPN transistor is coupled to a ground of the protection unit.
Dependencies are inferred from the claim text.