Common device node balun grounded balanced amplifier
AssigneeAgilent Technologies, Inc.
InventorsMichael Wendell Vice, Michael Louis Frank
Life of this patent
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Abstract
An amplifier circuit includes an amplifier stage and a balun stage. The amplifier stage includes a common node connected to an external ground. An inductance is located between the common node and the external ground. The balun stage is connected to the amplifier stage. The balun stage includes a balun tail. The balun tail is directly connected to the common node of the amplifier stage so that a resulting connection between the balun tail and the common node bypasses the inductance between the common node and the external ground.
Claims21
An amplifier circuit comprising:
- an amplifier stage of the amplifier circuit, the amplifier stage including a common node connected to an external ground, wherein an inductance is located between the common node and the external ground;
- and,
- a balun stage of the amplifier circuit connected to the amplifier stage, the balun stage including a balun tail;
- wherein the balun tail is directly connected to the common node of the amplifier stage so that a resulting connection between the balun tail and the common node bypasses the inductance between the common node and the external ground.
A method for stabilizing an amplifier circuit comprising following step:
- (a) making an electrical connection between a balun tail of a balun stage of the amplifier circuit directly to a common node of an amplifier stage of the amplifier circuit, including the following substep:
- (a.1) making the connection in such a way that the connection bypasses an inductance between the common node and an external ground.
An amplifier circuit comprising:
- an amplifier means for amplifying an input signal to the amplifier circuit, the amplifier means including a common node connected to an external ground, wherein an inductance is located between the common node and the external ground;
- and,
- a balun means for balancing an output signal of the amplifier circuit, the balun means including a balun tail;
- wherein the balun tail is directly connected to the common node of the amplifier means so that a resulting connection between the balun tail and the common node bypasses the inductance between the common node and the external ground.
Dependencies are inferred from the claim text.