Amplifiers – With semiconductor amplifying device – Including distributed parameter-type coupling
Patent
1994-08-15
1995-11-21
Mottola, Steven
Amplifiers
With semiconductor amplifying device
Including distributed parameter-type coupling
330295, 330307, H03F 360, H03F 368, H03F 3195
Patent
active
054691087
ABSTRACT:
A circuit for compensating for the phase velocity differences caused by the layout arrangement of a high-frequency transistor circuit comprises a shunt reactive element 60 coupled to an input or output terminal 51 of a first transistor 48 in a sequence of transistors arranged between input 42 and output 54 transmission lines. The shunt reactive element provides adjustment in phase such that signals traversing various routes through the circuit add in phase at the circuit output. The circuit may also include series resonant circuits 102 between the input terminals 44 and 46 of transistors in such a sequence and between output terminals 51 and 52 of transistors in such a sequence. The series resonant circuits appear as short circuits at certain frequencies and thereby may be used to virtually eliminate the phase progression along transmission lines linking transistors in the sequence.
REFERENCES:
patent: 4631493 (1986-12-01), Vendelin et al.
patent: 4973918 (1990-11-01), Schindler
Avasarala, et al., "A 2.5-Watt High Efficiency X-Band Power MMIC," IEEE 1989 Microwave and Millimeter-Wave Monolithic Circuits Symposium, pp. 25-28.
Komiak, "Octave Band Eleven Watt," IEEE 1990 Microwave and Millimeter-Wave Monolithic Circuits Symposium, pp. 35-38.
Donaldson Richard L.
Kesterson James C.
Mottola Steven
Skrehot Michael K.
Texas Instruments Incorporated
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