1.8 RF AGC and mixer implemented with a novel four-terminal HBT (FHBT)

S. Zhou, P. Ma, L. Zhang, P. Zampardi*, J. Li, Y. S. Chang, Mau-Chung Chang

*Corresponding author for this work

Research output: Contribution to conferencePaper

Abstract

A recent discovery indicates that the current sign of AlGaAs/GaAs HBTs can be externally modulated by biasing an extra Schottky electrode that contacts the emitter passivation ledge directly. This discovery leads to the possibility of implementing complex RF AGC (automatic-gain-control) and signal mixing functions within a 4-terminal HBT (FHBT) at relatively low power supply voltages (down to Vcc=1.8V). This low voltage operation has been extremely difficult for the conventional Gilbert-cell mixer design based on regular 3-terminal HBTs. The demonstrated FHBT AGC has 24dB gain control up to 6GHz and the mixer has 7dB conversion gain and -12.5dBm IIP3 without emitter or base degeneration.

Original languageEnglish
Pages241-244
Number of pages4
DOIs
StatePublished - 1 Jan 2001
Event2001 IEEE Radio Frequency Integrated Circuits (RFIC) - Phoenix, AZ, United States
Duration: 20 May 200122 May 2001

Conference

Conference2001 IEEE Radio Frequency Integrated Circuits (RFIC)
CountryUnited States
CityPhoenix, AZ
Period20/05/0122/05/01

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    Zhou, S., Ma, P., Zhang, L., Zampardi, P., Li, J., Chang, Y. S., & Chang, M-C. (2001). 1.8 RF AGC and mixer implemented with a novel four-terminal HBT (FHBT). 241-244. Paper presented at 2001 IEEE Radio Frequency Integrated Circuits (RFIC), Phoenix, AZ, United States. https://doi.org/10.1109/RFIC.2001.935684