| 摘要 |
A segmented digital-to-analog converter includes a string DAC (210) and an interpolation DAC (211). The string DAC includes 2M series-connected string resistors (Ri) and 2M pairs of switches (Sia,b). The switch pairs couple a first (201) and a second (202) conductor across each resistor responsive to the MSB subword decoder (212). The interpolation DAC (211), responsive to the LSB subword decoder (215), connect an input of a plurality of differential stages to the first (201) and second (202) conductor. Each differential stage includes a first (QjA) and a second (QjB) transistor differentially coupled to a corresponding tail current source (IN). The drains of the first (QjA) and second (QjB) transistors connect to a first (QL1) and second (QL2) load devices and the inverting and non-inverting inputs of the output amplifier (205) via a third (203) and fourth (204) conductors, respectively.
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