| 摘要 |
The analogue signal is fed to converting unit 1 of small capacity but high resolution. When the input signal exceeds the capacity of unit 1 an over-signal is supplied to a digital memory 3 which, by way of a D-A conversion unit 5 and an analogue subtractor 6, subtends from the input signal an integral muitiple of the output of unit 1. The corresponding digital amount is added to the output of unit 1 by the adder 4. When the input to converter 1 is within its capacity, an under-signal is fed to memory 3 and determines the extent of the subtraction. |
