A replacement heart valve assembly has a stent frame and a replacement valve. An ith two-input selector among a plurality of input selectors of the first DA converter selects a th input voltage or a th input voltage based on input data, and outputs the selected input voltage to a selector of a selector block in the subsequent stage. The size of each company region corresponds to a specified characteristic of said company region. By doing this, it is possible to provide a compact image pickup lens unit which be used in an image pickup device having a superior performance by a cheap cost. The aligner comprises an inverted \u201cV\u201d-shaped element adapted to accept the open side of magazines from below and includes a spring for keeping tension on the magazine.