| 摘要 |
<p>An electronic weight measuring device includes a load cell producing an output voltage varying from -VX to 0 volts according to the weight of load, a bias circuit producing a variable bias voltage VX, voltage generator receiving the output voltages from the load cell and bias circuit and producing an output voltage varying within a range from -1/2 VX to +1/2 VX, and an analog-digital converter for converting the output voltage from the voltage generator. The electronic weight measuring device further includes a zero point setting circuit coupled to the load cell and bias circuit and applying an output voltage varying with the output voltage from the bias circuit to the load cell, so that the no-load output voltage of the load cell is kept at substantially 0 volts.</p> |
