Variable attenuation device intended to be inserted between a tr

Details Variable attenuation device intended to be inserted between a tr Variable attenuation device intended to be inserted between a tr

1989-09-15

1990-07-17

Laroche, Eugene R.

Wave transmission lines and networks

Attenuators

333 81A, 307320, 307540, H01P 122

Patent

active

049423754

ABSTRACT:
A variable attenuation device intended to be inserted between a transmitter circuit having a certain internal impedance and a load circuit; it composed of at least on parallel attenuation branch made up from a variable resistance component (in particular a p-i-n diode) and a bias circuit to vary the resistance of the component as a function of an attenuation control variable. The parallel attenuation branch has a limiting component which is connected in series with the variable resistance component and whose value ensures the matching of the internal impedance of the transmitter circuit.

REFERENCES:
patent: 3529266 (1970-09-01), King
patent: 3846724 (1974-11-01), Maier
patent: 4047131 (1977-09-01), Ludikhuizo
patent: 4097827 (1978-06-01), Williams
patent: 4216445 (1980-08-01), Abajian
patent: 4236126 (1980-11-01), Weller et al.
patent: 4378536 (1983-03-01), Schwarzmann
patent: 4590417 (1986-05-01), Tanaami et al.
patent: 4668882 (1987-05-01), Matsuura

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