A 30 GHz bandwidth AlGaAs-GaAs HBT direct-coupled feedback amplifier

descriptionPublicationkeyboard_double_arrow_right Article 01 Aug 1991Publisher:Institute of Electrical and Electronics Engineers (IEEE)Journal:IEEE Microwave and Guided Wave Letters, volume 1, pages 208-210 (issn: 1051-8207,

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Authors: N.H. Sheng; W.J. Ho; N.L. Wang; R.L. Pierson; P.M. Asbeck; W.L. Edwards;

doi: 10.1109/75.84589

A 30 GHz bandwidth AlGaAs-GaAs HBT direct-coupled feedback amplifier

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Abstract

A DC to 30 GHz broadband amplifier based on the Darlington connected transistors with series and shunt resistive feedback was implemented with self-aligned AlGaAs-GaAs heterojunction bipolar transistor (HBT) technology. The measured performance shows 7.8 dB of gain with -3-dB roll-off bandwidth of 30 GHz. Measured at 1 GHz, the noise figure was 5.7 dB, 1-dB compression power was 11 dBm, and the third-order intermodulation product intercept point (IP3) was 23.9 dBm. >

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