Patent ID: 6018370
Filing Date: 2000-01-25
Classification: G05F,H04N

Abstract:
A current source and threshold voltage generation apparatus for supplying an output current and corresponding threshold voltage signal, comprising:a. a current generation circuit for generating a first current;b. a first plurality of devices through which the first current is supplied, each of the devices having a corresponding size, wherein a ratio of the sizes of the devices determines an amount of current flowing through each of the devices and a total amount of current flowing through the devices is equal to the first current and further wherein an output current having a value different than the first current is generated to correspond to the current flowing through a predetermined one of the devices; andc. a voltage generation circuit coupled to the first plurality of devices for generating a threshold voltage signal corresponding to the output current so that any variations within the output current are proportionately reflected within the threshold voltage signal.