Patent ID: 7372316

Claim:
A first order temperature compensated reference current generator comprising: a current device providing a controlled current, wherein said current device is a current mirror circuit having a plurality of transistors with common control terminals with one of the conducting terminals connected to a supply terminal; a differential amplifier providing its output to the common control terminals of said plurality of transistors for enabling a current through said transistors such that the second conducting terminals of these transistors are at the same voltage level, the input terminals of the differential amplifier being connected to the second conducting terminals of said plurality of transistors to detect a voltage difference thereby providing an improved power supply rejection ratio; a startup circuit connected to said current device for initiating operation of said current device, the startup circuit comprising a tank circuit comprising a series connected resistor and capacitor, and a current definition mechanism driven by said current device for supplying a current which is independent of temperature, process and individual temperature coefficients circuit elements used; wherein said current definition mechanism incorporates a voltage controlled resistor driven by a control voltage and having a certain temperature coefficient.