| 摘要 |
PURPOSE:To automatically perform an instant resetting operation in an circuit which is used to prevent a instantly resetting galvanometer for an electrocardiograph or the like from being deflected fully. CONSTITUTION:An upper-limit reference voltage Vu and a lower-limit reference voltage VL which correspond to the level of an input signal by which a pointer 9a for a galvanometer 9 is deflected fully are set by a reference-voltage setter 15. The reference voltages Vu, VL are compared with the level of an input signal which is supplied newly. When the level of the input signal becomes the reference voltage Vu or higher or the reference voltage VL or lower, the output of a timer circuit 11 is turned on for a definite time, and an analog switch 10 is turned on for a definite time. Thereby, the input of an amplifier circuit 6 becomes zero, and the pointer 9a for the galvanometer 9 is returned to the center. |
