Electrical attenuator

Details Electrical attenuator Electrical attenuator

1979-12-14

1981-11-10

Gensler, Paul L.

Wave transmission lines and networks

Attenuators

307540, H03H 725

Patent

active

043001084

ABSTRACT:
An attenuator for IF and RF electrical signals is disclosed comprising a digital mapping means which transforms a digital control word representing the amount of attenuation desired to a current gain control word and a voltage gain control word. The current gain control word causes a current gain means to impart a specific current through a control diode. A first voltage follower is used to measure the voltage imparted across the control diode. The voltage gain control word causes a voltage gain means to output a specific voltage to a summer which combines the specific voltage with the output voltage of the first voltage follower. The summed voltages are taken by a second voltage follower to the cathode of an attenuating diode, whose anode is connected to the signal to be attenuated.

REFERENCES:
patent: 3765020 (1973-10-01), Seager et al.
Hewlett-Packard Solid State Devices Application Note 912, An Attenuator Design Using PIN Diodes.

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