| 摘要 |
<p>WINDOW COMPARATOR The present invention relates to a window comparator. The comparator is comprised of a first circuit which has a pair of differential circuits interconnected at their inputs and outputs and interconnected with a pair of current sources and responsive to a differential input signal for conducting two dependently variable currents through different sides to an output circuit. The current sources each conduct I units of current to a different one of the pair of differential circuits a different voltage dropping element is connected to each current source in the input circuit for establishing two limits of the window comparator. An output circuit is comprised of a current mirror which has a pair of conducting paths, each respectively one of the variable currents from the input circuit. The output circuit is responsive to one side of the input circuit conducting more than a predetermined multiple of the current from the other side for indicating that the magnitude of the differential input signal exceeds one of the two limits.</p> |
