Patent ID: 6100833
Filing Date: 2000-08-08
Classification: H01L,H04N

Abstract:
A circuit for converting a digital signal of b-bits to an analog signal, where b is a positive integer greater than zero, comprising:a first array of first current cells;a second array having at least one second current cell;a selection circuit coupled to said first and second arrays such that a first predetermined number of first current cells and a second predetermined number of second current cells are activated in accordance with the digital signal; anda control circuit that generates at least one of voltages and clock signals coupled to at least one of said first and second arrays and said selection circuit,wherein each selected first current cell generates a predetermined first current and each selected second current cell generates a predetermined second current to an output line, a magnitude of the first and second predetermined currents has a prescribed ratio of I.sub.1 :I.sub.2, respectively, and a number n.sub.1 of first current cells is equal to an integer truncation of (2.sup.b -1)/I.sub.1.