| 摘要 |
PURPOSE:To raise resolution and also to eliminate variation of resolution and response speed, by converting an analog signal of a measuring result to a digital signal, integrating this output further, and using it as a digital integrator or an A/D converter. CONSTITUTION:An analog signal of a measuring result is converted to a digital signal by an A/D converter 2, and its output is inputted to an adder 3 and is added in order. This added value is transferred to a latching register 4 by a period which is obtained by frequency-dividing 6 an external clock signal 11, and in this way, a value which has been inputted to the register 4 is updated to a new value whenever the next latching signal comes in. An A/D conversion period is set optionally by the frequency being below an external clock signal, by a dividing factor setting signal 12 using a dividing factor of frequency dividers 6, 6'. When using only as an A/D converter, a changeover switch 13 is set to a time delaying circuit 7 so that the A/D conversion period which is obtained by the frequency divider 6 becomes equal to the latching period which is obtained by the frequency divider 6'. |
