Figure 4
From: Modeling and optimization of the line-driver power consumption in xDSL systems
Comparison of class-G LD power models to a real class-G LD with charge pumps. Our model of a class-G LD with charge pumps shows a higher (lower) power consumption compared to an ideal class-G (class-AB) design. It accounts for additional power losses at high transmit powers that are also observable in a real class-G implementation. However, all three LD power models show a similar shape as a function of transmit power P u below 14.5dBm.