Amplifiers – With semiconductor amplifying device – Including distributed parameter-type coupling
Patent
1996-10-07
1998-06-02
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including distributed parameter-type coupling
H03F 360
Patent
active
057606501
ABSTRACT:
An amplifier including an amplifying transistor flip-mounted on a coplanar waveguide pattern. Elements of stability and/or matching circuits are provided at least in part under the flip-mounted transistor to facilitate compact design and to improve component performance. A serial resistor-shunt inductor pair is provided with the resistor coupled proximate the transistor input and/or output and preferably configured within the CPW center conductor to provided more consistent component values. Embodiments of the present invention include a two-stage amplifier having a transmission segment formed between the two stages which serves to rotate the output impedance of the first stage toward a low noise match with the second stage and to rotate the input impedance of the second stage toward a high gain match with the first stage. The transmission segment may include a capacitive element for providing series capacitance and DC blocking. Adjustable impedance matching means are also taught.
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Faulkner Mark V.
Mohwinkel Clifford A.
Adamson Steven J.
Anderson Edward B.
Endgate Corporation
Mullins James B.
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