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US 4,540,954 AGranted
Singly terminated distributed amplifier
AssigneeRockwell International Corporation
InventorThomas R. Apel
Life of this patent
Estimating the term…
Abstract
A broadband distributed amplifier capable of amplifying frequencies from zero to 20 Gigahertz is disclosed having a singly terminated output. The singly terminated construction of the amplifier precludes the need for a termination resistor on the output and thereby enables substantially all of the output power to be utilized.
Claims12
An integrated circuit comprising:
- a. a plurality of amplifying means for amplifying an input signal and mounted on a semiconductor substrate;
- and
- b. means for interconnection of said amplifying means, each to the others, to form an amplification stage, said means for interconnection having a dissimilar susceptance and reactance for each connection from the susceptance and reactance of the other connection means, the dissimilarity a function of the total number of amplifying means in said stage and resulting in substantially all of the output of said amplifying means being provided to a singly terminated output.
A distributed amplifier having a singly terminated output comprising:
- a. an integrated circuit substrate;
- b. a plurality of active amplifier devices mounted on said substrate with electrical interconnection, each to the others, to form a distributed amplifier;
- and
- c. said electrical interconnection having a reactance difference between said active devices resulting in substantially all of the amplifier power being output to said singly terminated output.
1 more element
A traveling wave amplifier comprising:
- a. a plurality of amplifying devices on a single substrate, each of said devices interconnected with the others in a phase shifting parallel configuration and to a singly terminated output;
- and
- b. a phase difference in said interconnections, each from the others, such that substantially all of the power from said devices is output to said singly terminated output, said phase difference having a capacitive susceptance increasing toward the output as a direct function of the number of amplifying devices, from one device to the next, and also having inductive reactance decreasing toward the output as a direct function of the number of amplifying devices, from one device to the next.
Dependencies are inferred from the claim text.