| 摘要 |
The invention relates to an automatic level control circuit comprising an analog-to-digital (AD) converter (4) for discriminating an input signal with respect to a plurality of reference levels to produce a decoded digital signal and an error digital signal, and a reference voltage generator (6) responsive to said decoded digital signal and said error digital signal for providing a reference voltage to said AD converter (4), said reference levels being controlled to optimum ones responsive to a variation in the level of said input signal. The circuit is practable and simple in construction. |
