MMIC (monolithic microwave integrated circuit) low noise amplifi

Details MMIC (monolithic microwave integrated circuit) low noise amplifi MMIC (monolithic microwave integrated circuit) low noise amplifi

1987-09-24

1988-09-13

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including field effect transistor

330286, 330307, H03F 3193

Patent

active

047712473

ABSTRACT:
The invention relates to a low noise amplifier for use at microwave frequencies which may be fabricated using integrated circuit techniques. In accordance with the invention, critical components are made adjustable so as to simplify the design process and manufacturability of the amplifier. A two stage low noise amplifier is disclosed in which TEE networks are used as input and output networks in each stage, and in which one element of each TEE includes an adjustable spiral inductor. The value of each adjustable spiral inductor may be adjusted by removal of one or more air bridges disposed along the inner turn of the inductor. This permits one to "tune" the amplifier and optimize its performance.

REFERENCES:
patent: 4614915 (1986-09-01), Heston et al.
Tajima et al, "X, Ku-Band GaAs Monolithic Amplifier", 1982, IEEE MTT-S Digest, pp. 476-478.
MMIC: On-Chip Tunability, R. Goyal and S. S. Bharj Microwave Journal, Apr. 1987, (pp. 135, 138 and 139).

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