Amplifiers – With distributed parameter-type coupling means – Distributed amplifier
Patent
1994-06-13
1995-05-09
Mottola, Steven
Amplifiers
With distributed parameter-type coupling means
Distributed amplifier
330286, H03F 360
Patent
active
054143870
ABSTRACT:
A distributed amplifier includes an input side circuit including a plurality of distributed constant lines connected in series between an input terminal and ground and a plurality of source-grounded FETs for switching operation having drains connected to respective junctions of the distributed constant lines, an output side circuit including a plurality of distributed constant lines connected in series between an output terminal and ground, and a plurality of source-grounded amplifier FETs having gates connected to respective junctions of the distributed constant lines of the input side circuit via capacitors and drains connected to junctions of the distributed constant lines of the output side circuit. In this structure, since the input side circuit also serves as a distributed switch, when a T/R module is fabricated using the distributed amplifier, it is not necessary to add a distributed switch for controlling signal input and output, so that the chip size of the T/R module is reduced compared to the conventional T/R module. In addition, the signal transmission loss is reduced.
REFERENCES:
patent: 4973918 (1990-11-01), Schindler
patent: 5046155 (1991-09-01), Beyer et al.
IEEE 1990 Microwave and Millimeter-Wave Monolithic Circuits Symposium, "A Single Chip 2-20 GHz T/R Module", pp. 99-102, Schindler et al.
Nakahara Kazuhiko
Sasaki Yoshinobu
Mitsubishi Denki & Kabushiki Kaisha
Mottola Steven
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