Microwave integrated circuit

Details Microwave integrated circuit Microwave integrated circuit

1989-12-07

1991-04-23

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including field effect transistor

330286, H03F 316, H03F 360

Patent

active

050103059

ABSTRACT:
In a microwave integrated circuit, a series circuit of an inductive element and a variable capacitance element is inserted between an source of a field effect transistor of an initial stage circuit and ground. The capacitance of the variable capacitance element is controlled by an input signal applied to an external terminal so that an input impedance of the initial stage circuit is properly changed by the input signal applied to the external terminal. Thus, it is possible to set a system to an input matching characteristic which has a noise matching characteristic and a gain matching characteristic which fit to a system specification.

REFERENCES:
patent: 4458215 (1984-07-01), Huang et al.
patent: 4670722 (1987-06-01), Rauscher
patent: 4683443 (1987-07-01), Young et al.

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