Patent ID: 6218894
Filing Date: 2001-04-17
Classification: G05F

Abstract:
An electronic circuit with a reference circuit, the reference circuit comprisinga core circuit that includes:a first and second transistor and a resistor,each of the first and second transistors providing a current path to a reference voltage,the resistor being coupled to one of the first and second transistors so as to affect current flow through the current path of the one of the first and second transistors,current sources that are configured to supply currents through the each of the current paths of the first and second transistors, anda current deviation circuit that is configured to deviate a same adjustable fraction of each of the currents supplied by the current sources around each of the current paths of the first and second transistors, to the common reference voltage,whereina feedback signal from the core element is arranged to adjust the fraction such that current flowing through the resistor compensates for a difference in current densities between the first and second transistors, so that an equal current flows into the current paths of the core element.