A single-chip quad-band (850/900/1800/1900 MHz) direct conversion GSM/GPRS RF transceiver with integrated VCOs and fractional-n synthesizer

Molnar, Alyosha; Magoon, R.; Hatcher, G.; Zachan, J.; Rhee, Woogeun; Damgaard, M.; Domino, William; Vakilian, Nooshin

doi:10.1109/jssc.2002.804356

Cited by 132 publications

(31 citation statements)

References 13 publications

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“…11.9, where the cubic operation is broken up into a squaring and a multiplication. However, the design of an optimal interstage circuit architecture differs between multistage cubic term generators for receivers and polynomial predistorters [44]. Polynomial predistorters need only to retain the baseband envelope information of the distortion-producing signal because the distortion-producing signal and the desired output signal are the same.…”

Section: Cubic Term Generator Block Design Strategymentioning

confidence: 99%

“…It can be shown [44] that the bandwidth of the receiver interstage circuitry need only pass IM2 products over the range of two-tone beat frequencies specified to recreate the proper IM3 products at the output. For UMTS region 1 this range is from 65 to 250 MHz, which is much less than the 4.15-GHz bandwidth required to retain all of the IM2 products generated by the initial squaring circuit, as depicted in Fig.…”

Section: Cubic Term Generator Block Design Strategymentioning

confidence: 99%

See 1 more Smart Citation

Digitally Enhanced Alternate Path Linearization of RF Receivers

Hueber

Staszewski

2010

Multi‐Mode/Multi‐Band RF Transceivers for Wireless Communications

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Section: Cubic Term Generator Block Design Strategymentioning

confidence: 99%

Section: Cubic Term Generator Block Design Strategymentioning

confidence: 99%

Digitally Enhanced Alternate Path Linearization of RF Receivers

Hueber

Staszewski

2010

Multi‐Mode/Multi‐Band RF Transceivers for Wireless Communications

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“…8 reflects some biasing and neutralization modifications to the circuit shown in [6], permitting it to function under the low voltage supply headroom. Separate divide-by-two circuits are included immediately adjacent to the LO buffers in order to avoid problems associated with on-chip RF-LO coupling [21].…”

Section: B Mixer and Lo Buffermentioning

confidence: 99%

Equalization of Third-Order Intermodulation Products in Wideband Direct Conversion Receivers

Keehr

Hajimiri

2008

IEEE J. Solid-State Circuits

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Abstract-This paper reports a SAW-less direct-conversion receiver which utilizes a mixed-signal feedforward path to regenerate and adaptively cancel IM3 products, thus accomplishing system-level linearization. The receiver system performance is dominated by a custom integrated RF front end implemented in 130-nm CMOS and achieves an uncorrected out-of-band IIP3 of 7.1 dBm under the worst-case UMTS FDD Region 1 blocking specifications. Under IM3 equalization, the receiver achieves an effective IIP3 of +5.3 dBm and meets the UMTS BER sensitivity requirement with 3.7 dB of margin.

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“…It should be noticed that if the input impedance matching conditions [see (6), (7)] are met, the LNA transconductance, given by (8), is relatively constant at the given resonance frequency , since it depends only on . For the same reason, the LNA voltage gain, given by (9), varies mainly along the LNA load impedance at the given frequency .…”

Section: Gain Stabilization Of Common-gate and Inductively Degenementioning

confidence: 99%

A Gain Stabilization Technique for Tuned RF Low-Noise Amplifiers

Sivonen

Vilander

Pärssinen

2004

IEEE Trans. Circuits Syst. I

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Abstract-A gain stabilization technique for tuned integrated low-noise amplifiers (LNAs) is presented. The proposed method regulates the LC-tuned load impedance of the amplifier at the operation frequency against variations of passive devices in integrated circuit (IC) process. The impedance stabilization technique is based on the excellent relative accuracy of integrated resistors. Although the absolute deviation of the integrated resistors can be as large as 20%, the relative deviation can be made smaller than 1% provided that resistors are placed close to each other. By applying the proposed method, the voltage-gain variation of the inductively degenerated common-source LNA, which is the most popular LNA architecture, can be reduced several decibels. As a consequence, the entire radio receiver can more easily meet its specifications in the presence of IC process variations and the product yield is improved. Finally, besides the LNAs, the presented stabilization technique can also be utilized in other tuned amplifiers, filters or oscillators employing damped LC-tuned loads.

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A single-chip quad-band (850/900/1800/1900 MHz) direct conversion GSM/GPRS RF transceiver with integrated VCOs and fractional-n synthesizer

Cited by 132 publications

References 13 publications

Digitally Enhanced Alternate Path Linearization of RF Receivers

Digitally Enhanced Alternate Path Linearization of RF Receivers

Equalization of Third-Order Intermodulation Products in Wideband Direct Conversion Receivers

A Gain Stabilization Technique for Tuned RF Low-Noise Amplifiers

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