| 摘要 |
The present invention is directed to a differential comparator including first and second amplifiers with a capacitive feedback network therebetween, a first and second capacitor disposed between a first and second input terminals of the comparator and inputs to the first and second amplifiers, respectively, and switching means. The switching means includes first gating means for causing an input and output of each amplifier to be precharged to a predetermined value, and second gating means for connecting the first and second input terminals to the first and second capacitors during a first phase of operation. During a second phase of operation, the first and second gating means release the amplifiers from their precharged state, and isolate the first and second input terminals from the first and second capacitors. A third gating means concurrently places a short across input terminals of the first and second capacitors. For increasing the latching speed of the differential comparator, a fourth gating means isolates the first and second capacitors from the inputs of the first and second amplifiers when a latching of the first and second amplifiers has begun during the second phase of operation. A method of providing a differential comparison is also provided. |
