Presentation Information
[C-12-29]A Distributed Cascode Differential Amplifier with 30.8-GHz Bandwidth in 180-nm CMOS Technology
〇Megumi Adachi1, Kyoya Takano1 (1. Tokyo University of Science)
Keywords:
wideband amplifier
Next-generation communication systems are expected to support high-capacity data transmission by utilizing multiple frequency bands and wideband, high-frequency signals. To amplify such wideband baseband signals, baseband amplifiers with both wide bandwidth and high gain are required. This paper proposes a distributed differential amplifier with an increased number of distributed stages and a cascode structure to improve gain while maintaining wideband performance. The distributed architecture compensates for parasitic capacitances to achieve wideband operation, whereas the cascode structure enhances gain and improves high-frequency characteristics. The proposed amplifier was designed and evaluated using a 180-nm CMOS process. Circuit-level simulation results demonstrate a -3 dB bandwidth of 30.8 GHz and a maximum gain of 9.8 dB within the -3 dB bandwidth. These results verify that the proposed distributed cascode differential amplifier achieves high gain while maintaining wideband baseband operation.