Electronic weighing apparatus

Abstract

An electronic weighing apparatus comprises a load cell which provides an analog voltage associated with the weight of an article being placed on the apparatus. The analog voltage is converted into digital data responsive to each timing pulse by means of an analog/digital converter. The digital data is loaded in a digital display buffer responsive to each timing pulse and is then displayed in a digital manner by a display. On the other hand, a stable state detecting circuit compares the current digital data obtained from the analog/digital converter with the preceding digital data and determines the weighed value having reached a stable state upon coincidence of both the current and preceding pieces of the data. The timing pulse and thus the digital data is prevented from being loaded in the display buffer responsive to the output from the stable state detecting circuit, whereby the display buffer continues to maintain the digital data at the time point when the stable state is reached. Accordingly, the numerical value displayed by the display maintains the weighed value of the stable state. If and when the weighed value becomes below a predetermined value, the display buffer is loaded in a renewed manner with the digital data obtained in succession from the analog/digital converter.