| 摘要 |
<p>PURPOSE:To increase efficiency in using a memory in which sample data are written according to sample clock by writing the sample data in the memory by time division. CONSTITUTION:Sample data Da, Db are latched by latch circuits DL2, DL3 respectively at time (t1) corresponding to the rear edge of a sample clock SCL. Latched sample data Da, Db are sent out to a memory SM2 as sample data Dc through a multiplexer MPX for each latch circuit. Sample data Dc sent out from the multiplexer MPX are written in a memory SM2 at times (t2), (t3) corresponding to the rear edge of writing pulse WR consisting of two continuous pulses according to respective memory address. By this constitution, utilization efficiency of memory domain can be doubled compared with conventional constitution, and the number of memory can be reduced.</p> |
