| 摘要 |
<p>A single slope analog to digital converter uses a DAC (21) to trim the discharge current of a capacitor (10) during calibration thereof. A method of calibrating the analog to digital converter is provided which iterates required steps to obtain a correct current setting within a short period of time. The analog to digital converter discharges a capacitor (10) through a high impedance to obtain a linear discharge. The time to discharge the capacitor (10) appears in a counter and is indicative of the voltage across the capacitor (10) at the beginning of the discharge period once the analog to digital converter has been calibrated. </p> |
