JPS5553719A - Periodic function signal generating device - Google Patents

Abstract

PURPOSE:To obtain plural number of different periodic function signals simultaneously and in parallel by performing the reading of the periodic function data via the clock pulse featuring the frequency in accordance with the frequency of the periodic function signal. CONSTITUTION:The data of at least one cycle featuring the periodic function signal waveform which is required at processor CPU are formed with every signal in the form of digital signals Sd1-Sdn. These digital signals receive addition of the address designation signals to be sent to memory MM for memorization. Clock pulses CP sent from clock pulse generators CPG1-CPGn turn to reading CP to MM, and their frequencies are prescribed by velocity signals Ss1-Ssn. Thus the periodic function data are read out as the frequencies corresponding to the velocity signals. In this way, the data showing the periodic function signals stored in MM are read out by the frequencies required. And by repeating this reading in a high speed, various types of periodic function signals can be generated at one time.