Wave transmission lines and networks – Automatically controlled systems – With control of equalizer and/or delay network
Patent
1985-07-01
1988-01-26
James, Andrew J.
Wave transmission lines and networks
Automatically controlled systems
With control of equalizer and/or delay network
357 14, 357 51, 357 68, 333172, 333204, 333205, 334 15, H01L 2940, H01L 2948, H01L 2920
Patent
active
047219858
ABSTRACT:
The invention relates to a variable capacitance element operating in the ultra-high frequency range. In order to integrate this element on to an integrated circuit chip, the element is designed so that the control voltage does not interfere with the ultra-high frequency signal and has neither filters nor shock chokes which are not integrable. The element according to the invention utilizes the junction capacitances variation of at least one diode, reverse-biased by a voltage across a resistor, the high frequency signal being at the diode anode. The element construction comprises an active zone in a semiinsulating substrate. Two metallizations partly cover the active zone and form therewith at least one diode. A projection to the active zone forms the resistor, to which is applied the control voltage. The diodes are p-n junctions of schottky diodes. The semiconductor material is Si or from the III-V group. Application to oscillators, filters, phase shifters, etc. in ultra-high frequency equipment.
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Kohn Erhard
Magarshack John
Pavlidis Dimitrios
Perea Ernesto
"Thomson-CSF"
Jackson, Jr. Jerome
James Andrew J.
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