The ebook FEEE - Fundamentals of Electrical Engineering and Electronics is based on material originally written by T.R. Kuphaldt and various co-authors. For more information please read the copyright pages. |
Home Semiconductors Amplifiers and Active Devices Attenuators Pi-Section Attenuator | |
Search the VIAS Library | Index | |
Pi-Section AttenuatorThe table in Figure below lists resistor values for the Π attenuator matching a 50 Ω source/ load at some common attenuation levels. The resistors corresponding to other attenuation levels may be calculated from the equations.
Formulas for Π-section attenuator resistors, given K, the voltage attenuation ratio, and ZI = ZO = 50 Ω. The above apply to the π-attenuator below. What resistor values would be required for both the Π attenuators for 10 dB of attenuation matching a 50 Ω source and load?
10 dB Π-section attenuator example for matching a 50 Ω source and load. The 10 dB corresponds to a voltage attenuation ratio of K=3.16 in the next to last line of the above table. Transfer the resistor values in that line to the resistors on the schematic diagram in Figure above.
|
|
Home Semiconductors Amplifiers and Active Devices Attenuators Pi-Section Attenuator |