Adjustable attenuation equaliser

摘要

Circuits are indicated for adjustable attenuation equalisers with adjustment-independent fixed attenuation points. T-shaped or pi -shaped attenuators are taken as a basis. The attenuation is adjusted through the connection of an adjustable reactance. In a first solution, this reactance is connected in series or in parallel with the shunt resistor of the T-component. In a second solution, this reactance is connected in parallel or in series with the series resistor of the pi -component. <IMAGE>