Abstract: A system and method for converting an analog control voltage to a PTAT current. A plurality of differential transistor pairs is provided, each differential pair including a reference transistor and a non-reference transistor, each transistor having a current path and a control electrode. A first output is coupled to a first end of the current path of each of said non-reference transistors and output means is coupled to a first end of the current path of each of the reference transistors. A plurality of current sources is provided, one current source for each differential pair, each current source having a current path coupled to an opposing end of the current path of a different one of the transistor pairs and a control electrode. A PTAT current generator is coupled to the control electrode of each of the current sources. Each differential pair is provided with a pair of electron emitting electrodes coupled together, the current source being coupled to the electron emitting electrodes.