DIGITAL/ANALOG CONVERTER CIRCUIT WITH INPUT BUFFER CIRCUIT

摘要

PURPOSE: A digital/analog converter circuit with an input buffer circuit is provided to output a signal having a desired noise characteristic by using an input buffer circuit for controlling an input signal and a simple RC filter. CONSTITUTION: An input buffer circuit(10) is synchronized with a low sampling frequency in order to receive digital input data and a multitude of signal from the outside. The input buffer circuit(10) is synchronized with a high sampling frequency in order to output the digital input data to a digital/analog converter(20). The digital/analog converter(20) receives the digital data from the input buffer circuit(10) and outputs analog signals. An RC filter circuit(30) receives the analog signal from the digital/analog converter(20) and filters frequencies of a low band to reduce noise.