| 摘要 |
PURPOSE:To remarkably improve the compression rate, drawing time, and dynamic range, by returning an output of the final stage amplifier to a voltage controlled amplifier and feeding it back to an adder. CONSTITUTION:An output of a voltage controlled amplifier 11 is rectified at a full wave rectifier 12 and applied to an adder 13 with a reference voltage -Ref. An output of the adder 13 is integrated with a complete integral network consisting of resistors R1-R4, switches S1-S4, a capacitor C and an amplifier 14. The output of the amplifier 14 is returned to the amplifier 11 and fed back to the adder 13. Thus, if the gain of the amplifier 14 is 1, the final output V0 and the reference voltage Ref are obtained, the compression rate of the output is theoretically at 0 dB, allowing to remarkably increase the characteristics of the compression rate. |
