Noise and dynamic range in lossy delay lines with compensation amplification

It is shown that if the loss in a delay line is compensated by amplifying, the dynamic range of the system is maximized by amplifying continuously along the delay line so that the signal strength remains constant. This principle is particularly applicable to microsound delay lines and delay equalizers. Moreover, if the noise figure of the amplifier is sufficiently small,the dynamic range may be greater than in the line without amplification, although it will never exceed that of a lossless line.