| 摘要 |
<p>An improved method and a circuit arrangement for converting an analog quantity into a digital quantity of the type where the analog quantity is fed to an integrating circuit, to which a reference quantity is temporarily connected during a conversion period and in which the pulses delivered by a pulse generator are also fed to a counter during the time when the reference quantity is connected to the integrating circuit in which during the first phase of a conversion period the analog quantity is fed to a first integrator and, during a second phase immediately following the first phase the analog quantity is fed to a second integrator, with pulses counted in a counter common to both integrators while the reference quantity is connected. Using two integrators permits connecting the analog quantity alternately to each of the integrators and connecting the reference quantity to the respective integrator in the time between, when the analog quantity is not connected. The conversion result obtained in each integrator is referenced to a fixed integration time for the analog quantity. By adding the two conversion results in the common counter, the overall conversion result is also referenced to a fixed integration time.</p> |
