Invention Grant
US09178524B1 Hybrid R-2R structure for low glitch noise segmented DAC 有权
用于低毛刺噪声分段DAC的混合R-2R结构

Hybrid R-2R structure for low glitch noise segmented DAC
Abstract:
The apparatus may be an N-bit DAC including (2M−1) parallel stages associated with M most significant bits, and (N-M) stages associated with (N-M) least significant bits. The (2M−1) parallel stages may deliver a first current to current-summing nodes of the DAC. The (N-M) stages may include a resistive network and a second pair of switches, and may deliver a second current to the resistive network of the stage. Each resistive network may scale the respectively delivered currents according to a binary weight of a stage corresponding to the resistive network, and may deliver the scaled currents to the pair of current-summing nodes. At least one of the (N-M) stages may be separated from the remaining stages.
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