VOLTAGE CONTROLLED VARIABLE CURRENT REFERENCE

PURPOSE: A current source providing a voltage-controlled variable-current reference provided to operate over a wide supply voltage range, and to increase or decrease current as a function of the supply voltage or a user supplied reference voltage. CONSTITUTION: A current source providing a voltage-c...

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Bibliographische Detailangaben
Hauptverfasser:	LEE LAN, AWSARE SALEEL
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CONTROLLING ELECTRICITY PHYSICS PULSE TECHNIQUE REGULATING SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
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Beschreibung
Zusammenfassung:	PURPOSE: A current source providing a voltage-controlled variable-current reference provided to operate over a wide supply voltage range, and to increase or decrease current as a function of the supply voltage or a user supplied reference voltage. CONSTITUTION: A current source providing a voltage-controlled variable-current reference employs a conventional current mirror to supply a current to a diode-connected transistor(22), and to a plurality of controllable current paths(30), wherein the controllable current paths are controlled by voltages from a voltage sensing circuit so that predetermined amounts of current are drawn away from the diode-connected transistor as function of a controlled voltage, so that the diode-connected transistor generates a voltage as a function of the current flowing through it which voltage is used to control an output transistor(12) and a current flowing through the output transistor.