| 摘要 |
PURPOSE:To simplify constitution by switching the functions of a code controlling circuit for switching between the D/A conversion of data having a code and that of data having no code, and thus achieving switching at a digital part composed of an analog part. CONSTITUTION:During the input of data with a code, the code bit is inputted to a code controlling circuit to control the output of a selector SEL according to the code. The data with the code is converted by a code converter CDC into a binary code, which is stored in a register. The output S1 of the control circuit SC is applied as ''1'' to a D/A converter DAC when it is positive, and the output S2 is applied as ''0'' when it is negative. During the input of data having no code, the output S2 is ''0'' and the selector SEL selects an output Q; and the output S1 is a bit which corresponds to the code bit. When the data with the code is inputted, a 0-+ or -5V output is generated at an output OUT1 and when the data having no code is inputted, a 0-10V output is generated at an output OUT2. |
