Abstract: A folded R-2R ladder current-steering digital-to-analog converter is disclosed. In the folded R-2R ladder current-steering digital-to-analog converter, each node in the R-2R ladder is electrically coupled with a plurality of current sources with different weights. Therefore, the numbers of the resisters and current sources can be reduced, and efficient power saving and the high-speed operation can be achieved.

Abstract: A method of manufacturing super-absorbent polymer (SAP) which is powdery, insoluble in water, and able to absorb water, blood and urine with slight soluble substances. The method includes at least the following steps: mixing a monomer solution having at least 50 mol % of neutralized acrylic acid with polymerization initiators to synthesize a sticky precursor, wherein the monomer can be selected from acrylic acid, methacrylic acid, 2-acrylamido-2-methyl-propane sulfonic acid, or the mixtures thereof; mixing high hydrophilic epoxy compounds and polymerization initiators with the precursor and producing a gel via UV cross-linking; drying the gel at temperature of 100 to 250° C. to obtain a polymer; grinding and screening the polymer into constant particle size; coating the polymer with surface cross-linking agents; heating the polymer at temperature of 80 to 230° C.; and adding powdery inert inorganic salts into the polymer.

Abstract: The invention relates to a judgment apparatus for determining the size of a document. The judgment apparatus includes an automatic document feeding (ADF) with a scan window, a scanner carriage, and a decision module. The ADF transmits the document. The scanner carriage determines a first dimension of the scan window masked by the document, and outputs the first size. The decision module determines the size of the document according to the first dimension output by the scanner carriage.