Patent ID: 8441308

Claim:
An electronic device comprising circuitry for generating a current with a predetermined temperature coefficient (TC) comprising: a bias current source (I bias ); an TC component (T 1 ) receiving the bias current (I bias ); a resistor (R); a current source (P 1 , P 2 ) supplying current (I NTC ) to the resistor (R); and a differential amplifier (AMP) having a positive input receiving a voltage across the TC component (T 1 ), a negative input receiving a voltage across the resistor (R) and an output controlling the current source (P 1 , P 2 ), the differential amplifier (AMP) having a predetermined input related offset (V OS ) on the positive input to decrease the voltage drop (V R ) across the resistor (R), said differential amplifier (AMP) having a differential input stage including a first input MOSFET transistor connected to the positive input having a first width/length ratio, and a second input MOSFET transistor connected to the negative input having a second width/length ratio different from the first width/length ratio selected to provide the input related offset (V OS ).