Patent ID: 9590504
Date: 2017-03-07
CPC Classifications: G05F,H02M

Claim:
1. A current reference comprising: a tracking voltage generator, the tracking voltage generator comprising: a flipped gate transistor; a first transistor, the first transistor having a first leakage current, wherein the first transistor is connected with the flipped gate transistor in a Vgs subtractive arrangement; an output node configured to output a tracking voltage, the tracking voltage having a positive or negative temperature dependency base on the flipped gate transistor and the first transistor; and a second transistor connected to the output node, the second transistor having a second leakage current; an amplifier configured to receive the tracking voltage and to output an amplified signal; a control transistor configured to receive the amplified signal and to conduct a reference current therethrough; and a control resistor connected in series with the control transistor, the current reference thereby being configured so that the temperature dependency of the tracking voltage is substantially equal to a temperature dependency of a resistance of the control resistor, thereby maintaining the reference current at a constant value.