Amplifiers – With semiconductor amplifying device – Including plural stages cascaded
Reexamination Certificate
2005-03-08
2005-03-08
Choe, Henry (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including plural stages cascaded
C330S286000
Reexamination Certificate
active
06864750
ABSTRACT:
In a cascode distributed amplifier of the present invention, a plurality of unit circuits are connected in parallel, and each unit circuit includes a pair of first and second transistors connected in series between an input transmission wire and an output transmission wire. The first transistor has a gate connected to the input transmission wire, a source grounded and a drain connected to the second transistor. The second transistor has a gate grounded, a source connected to the drain of the first transistor and a drain connected to the output transmission wire. Each unit circuit includes a damping resistor having a first end connected to the gate of the second transistor and a second end, and a capacitor having a first end connected to the second end of the damping resistor and a second end grounded.
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patent: 6400226 (2002-06-01), Sato
J.P. Fraysse et al., “A 2W, High Efficiency, 2-8GHz, Cascode HBT MMIC Power Distributed Amplifier”, 2000 IEEE MTT-S Digest, Jun. 11, 2000, pp. 529-532.
Arent & Fox PLLC
Choe Henry
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