Amplifiers – Signal feedback – Combined with control of bias voltage of signal amplifier
Patent
1987-09-25
1990-05-29
Hille, Rolf
Amplifiers
Signal feedback
Combined with control of bias voltage of signal amplifier
357 16, 357 41, 357 61, 330311, 330277, H01L 2980
Patent
active
049299867
ABSTRACT:
An FET device especially useful in common gate amplifier circuits used as amplifiers of microwave and millimeter wave signals. The device has a diamond film layer constituting the device's channel. Device geometry is selected so that, in a common gate amplifier circuit, device input and output are impedance matched to avoid phase cancellation between input and output. In one embodiment a boron nitride layer is disposed heteroepitaxially with the diamond channel and separating the channel from the gate. In another embodiment plural such devices are yoked together integrally source to drain in such a manner that charge carriers entering the second and subsequent stages do so at maximum velocity without the need to accelerate from zero or low velocity. The resulting device has a higher power handling capacity, upper frequency range, and dynamic range.
REFERENCES:
patent: 4658220 (1987-04-01), Heston et al.
Attachment "A" to the Declaration of Max N. Yoder, filed herewith, Applicons of Diamond Technology. The distribution of this document is set forth in said declaration.
Attachment "B" to the Declaration of Max. N. Yoder, filed herewith, Solicitating Bid No. N00014-86-R-0047, especially internal appendices 1-3 of Attachment B. The distribution of this document is set forth in said declaration.
Hille Rolf
Loke Steven
McDonnell Thomas E.
Miles Edward F.
The United States of America as represented by the Secretary of
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