Low power down-conversion RF mixers based on the Gilbert cell approach

Ari Vauhkonen, Kaj Grahn

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)


Three down-conversion mixers for low-voltage, balanced 900 MHz wireless applications are introduced. The mixers are implemented in a 0.8 μm BiCMOS process and based on the four transistor BJT switching quad widely used in Gilbert cells. The mixers are designed to operate at a supply voltage of 1.5 V and without external components. The implemented mixers have a few decibels of conversion loss, a third-order input intercept point of a few dBm and a single sideband noise figure of about 15 dB. It is demonstrated that modest mixer operation performance is achieved with a DC power consumption of only 1 mW. Also planar inductors on silicon and bond-wire inductors are shown to be valuable to achieve a return loss of about 9 dB for input and output ports of a mixer. The measurement results for the mixers as well as the lumped element models for the used planar inductor and for the bondwire are presented.
Original languageEnglish
Pages (from-to)33-42
JournalAnalog Integrated Circuits and Signal Processing
Issue number1
Publication statusPublished - 1999
MoE publication typeA1 Journal article-refereed


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