To indicate the power level, I came up with a small driver for the VU meter
The amplifier is a chip for hearing aids. The logarithm occurs on the nonlinear characteristic of the diode chain. At the output, a forcing chain is added, which allows the arrow to move quickly forward and slowly roll back.
Gain characteristic:
General view of the structure with the SO-53 VU meter
There is one drawback, at elevated temperatures, the driver lies, so this driver is of little use in "hot amplifiers" without its own cooling.
The amplifier is a chip for hearing aids. The logarithm occurs on the nonlinear characteristic of the diode chain. At the output, a forcing chain is added, which allows the arrow to move quickly forward and slowly roll back.
Gain characteristic:
General view of the structure with the SO-53 VU meter
There is one drawback, at elevated temperatures, the driver lies, so this driver is of little use in "hot amplifiers" without its own cooling.