A CMOS switched transconductor mixer

Klumperink, Eric A.M.; Louwsma, S.M.; Wienk, G.J.M.; Nauta, Bram

doi:10.1109/jssc.2004.831797

Cited by 137 publications

(78 citation statements)

References 14 publications

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“…12. It is similar to the switched transconductor mixer [21] in the sense that lower-tree common-source transistors ( and ) are driven by the LO. The power mixer has high peak power efficiency, since the common-source transistors switch between triode and cut-off modes.…”

Section: B Power Mixer Unitmentioning

confidence: 99%

An octave-range watt-level fully integrated CMOS switching power mixer array for linearization and back-off efficiency improvement

Kousai

Hajimiri

2009

2009 IEEE International Solid-State Circuits Conference - Digest of Technical Papers

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Section: B Power Mixer Unitmentioning

confidence: 99%

An octave-range watt-level fully integrated CMOS switching power mixer array for linearization and back-off efficiency improvement

Kousai

Hajimiri

2009

2009 IEEE International Solid-State Circuits Conference - Digest of Technical Papers

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“…Here the PA is a single transistor operating as transconductor (V-I converter), which is switched on and off by the LO signal via a switch (NMOS transistor driven by a digital inverter). Thus the V-I conversion and upconversion is done in the same circuit, via a switched transconductor mixer [4]. With respect to efficiency this circuit resembles a single transistor (class A) power amplifier.…”

Section: Filter-less Power Up-convertermentioning

confidence: 99%

Multipath Polyphase Circuits and their Application to RF Transceivers

Klumperink

Shrestha

Mensink

et al. 2007

2007 IEEE International Symposium on Circuits and Systems (ISCAS)

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Abstract-Nonlinearity and time-variance in Radio Frequency (RF) circuits leads to unwanted harmonics and intermodulation products, e.g. in power amplifiers and mixers. This paper reviews a recently proposed multipath polyphase circuit technique which can cancel such harmonics and intermodulation products. This will be illustrated using a power upconverter IC as an example. The upconverter works from DC to 2.4 GHz, and the multipath polyphase technique cleans its spectrum up to the 17th harmonic, keeping unwanted spurious responses more than 40dB below the carrier. The technique can also be useful for other applications, and some possible applications will be discussed.

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“…Here the PA is a single transistor operating as a transconductor (V-I) converter, which is switched on and off by the LO signal via a switch. Thus, the V-I conversion and upconversion is done in the same circuit, via a switched transconductor mixer [7]. With respect to efficiency this circuit resembles a single transistor (class A) power amplifier.…”

Section: A Basic Power Upconvertermentioning

confidence: 99%

“…In the current paper, we exploit the polyphase multipath circuit theory recently proposed in [6], to further reduce or even completely eliminate filters by canceling a very large multitude of harmonics and sidebands. We apply the technique to realize a wideband filterless power upconverter [1], using only digital circuits and switched transconductor mixers [7]. Compared to previous work, this paper adds a detailed analysis of the polyphase multipath technique, and an extensive discussion on the operating principle and design considerations for the CMOS power upconverter.…”

mentioning

confidence: 99%

A Polyphase Multipath Technique for Software-Defined Radio Transmitters

Shrestha

Klumperink

Mensink

et al. 2006

IEEE J. Solid-State Circuits

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Abstract-Transmitter circuits using large signal swings and hard-switched mixers are power-efficient, but also produce unwanted harmonics and sidebands, which are commonly removed using dedicated filters. This paper presents a polyphase multipath technique to relax or eliminate filters by canceling a multitude of harmonics and sidebands. Using this technique, a wideband and flexible power upconverter with a clean output spectrum is realized in 0.13-m CMOS, aiming at a software-defined radio application. Prototype chips operate from DC to 2.4 GHz with spurs smaller than 40 dBc up to the 17th harmonic (18-path mode) or 5th harmonic (6-path mode) of the transmit frequency, without tuning or calibration. The transmitter delivers 8 mW of power to a 100-load (2.54 V pp-di voltage swing) and the complete chip consumes 228 mW from a 1.2-V supply. It uses no filters, but only digital circuits and mixers.

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A CMOS switched transconductor mixer

Abstract: Ultra-low-voltage mixer and VCO in 0.18-m CMOS, In IEEE Radio Frequency Integrated Circuits Symposium Digest, June 2005, pp. 167-170. 8. C. Hermann, M. Tiebout, and H. Klar, A 0.6-V 1.6-mW transformerbased 2.5-GHz downconversion mixer with ϩ5.4-dB gain and Ϫ2.

Cited by 137 publications

References 14 publications

An octave-range watt-level fully integrated CMOS switching power mixer array for linearization and back-off efficiency improvement

An octave-range watt-level fully integrated CMOS switching power mixer array for linearization and back-off efficiency improvement

Multipath Polyphase Circuits and their Application to RF Transceivers

A Polyphase Multipath Technique for Software-Defined Radio Transmitters

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