Patent ID: 6052020
Filing Date: 2000-04-18
Classification: G05F

Abstract:
A circuit comprising:a current source;first and second diode elements coupled to respective outputs of the current source at one end and to a common node at another end, the diode elements defining first and second diode voltages, respectively, a delta voltage defined as a difference between the first and second diode voltages;a resistive element coupled to the common node at one end and being fed by a further output of the current source at another end;an amplifier having an output coupled to control the current source in response to a signal at a first input coupled to the first diode element and a signal at a second input coupled to the second diode element; andaveraging circuit coupled to the resistive element and the first diode element, and configured to provide an average of voltages related to the delta voltage and the first diode voltage.