Circuit arrangement comprising an isolator integral with an admi

Details Circuit arrangement comprising an isolator integral with an admi Circuit arrangement comprising an isolator integral with an admi

1986-02-20

1988-02-09

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including distributed parameter-type coupling

330 53, H03F 360

Patent

active

047243996

ABSTRACT:
In a circuit arrangement comprising a three port isolator (21) which has input, output, and dummy ports (33, 22, and 23), an admittance element (41 to 43) is connected at a position or positions selected between the input and the output ports, between the output and the dummy ports, and between the dummy and the input ports. When the isolator comprises a strip line conductor having branches connected to the input, the output, and the dummy ports, the admittance element may be an extension or extensions of the branches. The output port is connected to an amplifier (14) directly or through an inductance element (34). The connection of the admittance element makes it unnecessary to connect a matching circuit which is otherwise essential between the isolator and the amplifier.

REFERENCES:
patent: 3651430 (1972-03-01), Ito et al.
patent: 3673518 (1972-06-01), Carr
patent: 3930206 (1975-12-01), Rosen et al.

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