| 摘要 |
The circuit for correctly converting the analog signal to the digital one includes a sample hold circuit (1) sampling and accumulating the input analog signal, a comparator (3) comparing the accumulated analog signal to the upper (VA) and lower (OV) reference voltages to provide the control signal, a constant current circuit (4) discharging the accumulated analog signal while the control signal is applied, a clock generator (5) generating the counting clock, a counter (6) counting the input clock while the control signal is applied, a timing circuit (2) synchronizing the sampling, holding, and counting times, and a converter (7) converting the input parallel data to the serial one.
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