INTEGRATION TIME VARIABLE TYPE DUAL SLOPE INTEGRATOR

摘要

PURPOSE:To ensure more flexible measurement compared with a conventional case where the integration time is fixed by varying the integration time and at the same time correcting the discharge time in response to the integration time. CONSTITUTION:A control circuit 16 sets the integration time to a counter 11 for integration time. Then the circuit 16 actuates the counter 11 to close a switch 3. Thus the signal to be measured which is sent from a terminal 1 is applied to an integrator 5. The counter 11 opens the switch 3 when the set integration time elapses and completes the integration of the integrator 5. Then the circuit 16 closes a switch 4 and discharges the integrator 5 with the discharge signal sent from a terminal 2. This discharge time is counted by a counter 7 for discharge time. Here the output of the counter 7 is corrected by a calculator 12 for correction of integration time. Thus it is possible to perform more flexible measurement compared with a conventional case when the integration time is fixed.