| 摘要 |
PURPOSE:To hold charge in a holding circuit and to prevent output distortion from occurence without increase in conversion time by charging the primary and secondary capacitors connected in series depening upon the bit of digital input, and dividing this charge through a switch. CONSTITUTION:A switch 1 is controlled by a control circuit 10 of the D/A converter, and capacitors C1 and C2 connected in series are charged corresponding reference voltage plus V for every bit of the digital input A. These charges of the capacitors C1 and C2 are distributed by switches 7 and 6 and control of 7 and 8, and hold them in the holding circuits 4 and 9. The adder 11 adds output of the circuit 4 to that of the circuit 9, and outputs analog signals. Without increase in conversion time, output distortion generating in analog signals due to capacity differences between the capacitors C1 and C2 is prevented from occurence. |
