Current limiting circuit portion
AssigneeNordic Semiconductor ASA
InventorHsin-Ta Wu
Life of this patent
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Abstract
A current limiting circuit portion for limiting an output current of an electronic device includes an input voltage line for receiving an input voltage and a trimming circuit portion. The trimming circuit portion includes a resistive part providing a first resistance that is configurable based on one or more resistance control signals applied thereto, and a condition-tracking part connected in series with the resistive part that includes a condition-tracking transistor, the condition-tracking part providing a second resistance that is dependent on temperature and the input voltage.
Claims19
A current limiting circuit portion for limiting an output current of an electronic device, the current limiting circuit portion comprising:
- an input voltage line for receiving an input voltage;
- a trimming circuit portion comprising:
- a resistive part providing a first resistance that is configurable based on one or more resistance control signals applied thereto;
- and
- a condition-tracking part connected in series with the resistive part and comprising a condition-tracking transistor, the condition-tracking part providing a second resistance that is dependent on temperature and said input voltage;
- and
- wherein the current limiting circuit portion further comprises a supply rail, separate from the input voltage line, for receiving a supply voltage, wherein the second resistance provided by the condition-tracking part is further dependent on said supply voltage.
Dependencies are inferred from the claim text.