Wave transmission lines and networks – Attenuators
Patent
1995-12-11
1997-08-12
Gensler, Paul
Wave transmission lines and networks
Attenuators
333 81A, H03H 724
Patent
active
056569785
ABSTRACT:
A bridge T attenuator which includes PIN diodes in both the bridge arm and in the shunt arm, and in which the current through the shunt arm is controlled with respect to the current through the bridge arm, so that the product of these two currents equals a constant. This is accomplished by a feedback loop. Thus a relatively simple, inexpensive, and entirely analog solution is provided for a bridge T attenuator to be used with a radio frequency signal, so that a prescribed level of attenuation set by a user may be maintained while the impedance is maintained at a fixed value over the entire attenuation range.
REFERENCES:
patent: 3289120 (1966-11-01), Anders et al.
patent: 3529266 (1970-09-01), King
patent: 3663900 (1972-05-01), Peterson
patent: 3921106 (1975-11-01), Williams
patent: 4236126 (1980-11-01), Weller et al.
Bianu Daniel
Gall Charles H.
Gensler Paul
Harmonic Lightwaves
Klivans Norman R.
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