| 摘要 |
An amplifier with wide gain range includes a signal converting unit, a channel unit, and multiple amplifiers. The signal converting unit receives a gain modulation signal and accordingly outputs multiple modulation signals and multiple selection signals. Based on a level of the gain modulation signal, one of the selection signals is set at a first logic state and the other selection signals are at a second logic state. The channel unit has multiple channels, respectively controlled by the selection signals, so as to conduct the channel with at the first logic state. The amplifiers are connected in series. Output terminals of the amplifiers are also respectively output to the channels of the channel unit. The amplifiers are also controlled by the modulation signals of the signal converting unit. |
