Patent ID: 6175323
Filing Date: 2001-01-16
Classification: H03M

Abstract:
A current folding and interpolating circuit in an analog-to-digital converter for converting an analog input voltage to a digital output, comprising:L folders, where L is greater than 1, each comprising:M differential pairs, where M is greater than 1, each of said differential pairs having N first transistors, where N is greater than 1, said first transistors having source terminals coupled together and biased by said analog input voltage and N second transistors with source terminals coupled together and biased by a reference voltage, and a current source coupled to the source terminals of the first and second transistors;selected drain terminals of the first transistors of one folder being coupled to selected drain terminals of the first transistors of at least one other folder for generating at least one interpolated signal; andselected drain terminals of the second transistors of one folder being coupled to selected drain terminals of the second transistors of at least one other folder for generating at least one interpolated signal.