FREQUENCY CONVERTING CIRCUIT FOR DIGITAL SIGNAL TRANSMISSION SYSTEM

摘要

The frequency converter converts the sampled source digital signal to record directly to another system without O/A conversion. The digital signal divided by a counter (CT1) is applied to address terminals of each RAM (RAM1-2) through each line selector (S3-4). A synthesised digital audio input signal (Din) is also applied to each RAM through each line selector. The output signal of each RAM is applied to a delay circuit (DLY) through each line selector (S1-2). The output of the delay circuit is mixed with output of a synch. signal generator (SYN) to output the frequency converted digital signal (Dout).