| 摘要 |
<p>A data communication device performs stable data communications without a malfunction in a system downsized by realizing bi-directional data communications using two terminals. The data communication device includes: a signal terminal (IN) for inputting a received signal having portions of different duty ratios and a constant pulse frequency; a reference voltage terminal (GND) for inputting a first reference voltage; a clock generation circuit (11) for generating a clock signal according to the received signal; a data signal generation circuit (12) for generating a data signal by identifying a duty ratio of the received signal; a transmission circuit for outputting a transmission signal to the signal terminal; and a regulator circuit (14) for generating power supply voltages of the clock generation circuit, the data signal generation circuit, and the transmission circuit on a basis of an internally generated second reference voltage, the received signal, and the first reference voltage.</p> |
