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US 12,249,960 B2Granted
Active balun design
AssigneeAnalog Devices, Inc.
InventorsSong Lin, Xudong Wang, Jinzhou Cao, Christopher Eugene Hay
Life of this patent
Estimating the term…
Abstract
The present subject matter relates to active balun circuits. An active balun circuit includes a plurality of transistors; an output transmission line connected to output terminals of the transistors; an input transmission line; and a plurality of serial capacitors coupled to an input terminal of the transistors and the input transmission line.
Claims18
A balun circuit comprising:
- a plurality of transistors;
- an output transmission line connected to output terminals of the transistors;
- an input transmission line;
- a plurality of serial capacitors coupled to input terminals of the transistors and the input transmission line;
- and
- a resistive-capacitive (RC) feedback path, the RC feedback path including a resistor and a capacitor connected in series between the input transmission line and the output transmission line.
3 more elements
An electronic device comprising:
- a balun circuit including a first integrated circuit (IC) including:
- an input transmission line;
- an output transmission line;
- a plurality of transistors, each transistor including an output terminal connected to the output transmission line;
- a plurality of shunt capacitors, each shunt capacitor coupled to the output terminal of the transistors and circuit ground;
- and
- a plurality of serial capacitors coupled to input terminals of the transistors and the input transmission line
- first and second DC blocking capacitors each connected to a different end of the output transmission line;
- and
- a Direct Current (DC) bias inductor connected to the output transmission line and a DC circuit supply.
7 more elements
An electronic device comprising:
- a balun circuit including a first integrated circuit (IC) including:
- an input transmission line;
- an output transmission line;
- a plurality of transistors, each transistor including a first output terminal connected to the output transmission line, and a control terminal coupled to the input transmission line;
- a plurality of resistors, each resistor coupled to a second output terminal of the transistors and circuit ground;
- a first port connected to an end of the output transmission line;
- a second port connected to the input transmission line;
- a third port connected to a different end of the output transmission line than the first port;
- and
- wherein the balun circuit converts a balanced signal received at the second and third ports to an unbalanced signal at the first port.
7 more elements
Dependencies are inferred from the claim text.