Controlling current limits in current limiting circuits

An example current limiting apparatus comprises a first transistor to carry a first current; a sense transistor coupled to the first transistor, the sense transistor to carry a sense current that is a function of the first current; a first amplifier coupled to the first transistor and the sense tran...

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Bibliographische Detailangaben
Hauptverfasser:	Roy, Subrato, Chauhan, Ankur
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CONTROLLING CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE PHYSICS PULSE TECHNIQUE REGULATING SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES TESTING THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:	An example current limiting apparatus comprises a first transistor to carry a first current; a sense transistor coupled to the first transistor, the sense transistor to carry a sense current that is a function of the first current; a first amplifier coupled to the first transistor and the sense transistor, the amplifier to achieve a common voltage potential on terminals of the first and the sense transistors; a second amplifier coupled to the first amplifier and the sense transistor, the second amplifier to control the first and sense transistors based on the sense current; and a circuit coupled to the first and second amplifiers, the circuit to control an input to the second amplifier based on an input to the first amplifier such that a current limit of the first transistor remains below a programmed current limit of the first transistor.