A 1.3-GHz IF digitizer using a 4/sup th/-order continuous-time bandpass ΔΣ modulator

Kaplan, T.; Cruz-Albrecht, Jose; Mokhtari, M.; Matthews, D.S.; Jensen, J.F.; Chang, M.F.

doi:10.1109/cicc.2003.1249375

Cited by 23 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the direct digitization of the RF signal is possible and almost all the signal processing can be done in the flexible and programmable digital domain [1]. LC filters are preferred at RF, as they can achieve higher speed and dynamic range compared to their Gm-C and RC counterparts [2], [3].…”

Section: Introductionmentioning

confidence: 99%

Main defects of LC-based ΣΔ modulators

Ashry

Aboushady

2010

2010 53rd IEEE International Midwest Symposium on Circuits and Systems

View full text Add to dashboard Cite

In this paper, the main defects of LC-based Σ∆ modulators due to process variations are presented. Resonance frequency shift of LC tank circuit, which was discussed is some publications, is shown to be one among many other possible defects that are discussed in this paper. The effect of each defect on modulator output spectrum is shown and discussed. It is suggested that the information extracted from the output spectrum can be used to calibrate the modulator main blocks.

show abstract

Section: Introductionmentioning

confidence: 99%

Main defects of LC-based ΣΔ modulators

Ashry

Aboushady

2010

2010 53rd IEEE International Midwest Symposium on Circuits and Systems

View full text Add to dashboard Cite

show abstract

“…Continuous-time bandpass L\L ADCs with GHz clocks have been reported with center frequencies up to 2GHz [1][2][3][4]. This work is the first to demonstrate theoretically and experimentally that they can be scaled in frequency from 2GHz to 5.8GHz without changing the digital section and the sampling rate of the ADC.…”

mentioning

confidence: 94%

A 4.5 GHz to 5.8 GHz tunable δσdigital receiver with Q enhancement

Chalvatzis¹

2008

2008 IEEE MTT-S International Microwave Symposium Digest

View full text Add to dashboard Cite

“…However, their use is mostly limited to low-pass designs applied at the baseband, after fully analog demodulation stages. Bandpass converters [1], [2] although introduced several years ago, still have to prove themselves against pipeline converters as a competitive solution for high IF frequencies.…”

Section: Introductionmentioning

confidence: 99%

A Subsampling Quadrature <formula formulatype="inline"><tex>$\Sigma \Delta$</tex></formula> Modulator Based on Distributed Resonators for Use in Radio Receiver

Reekmans

Hernández

Prefasi

2007

IEEE Trans. Circuits Syst. II

View full text Add to dashboard Cite

The receiver architecture proposed in this brief seizes the subsampling properties of continuous-time sigma-delta (61) modulators based on distributed resonators to construct a quadrature receiver. The proposed architecture is based on a low-pass 61 modulator that subsamples an intermediate frequency signal around the sampling frequency and does not require quadrature mixers. Instead, the quadrature mixing is replaced by suitably choosing the sampling instants inside the loop. Two practical circuit implementations are proposed. The first one uses separate circuitry for the and paths. The second architecture introduces an innovative way to produce the and outputs that is immune to path mismatch due to the sharing of all the analog circuitry for both paths. The proposed modulator may be feasible for the typical IF frequencies used in cellular base stations.

show abstract

A 1.3-GHz IF digitizer using a 4/sup th/-order continuous-time bandpass ΔΣ modulator

Cited by 23 publications

References 5 publications

Main defects of LC-based ΣΔ modulators

Main defects of LC-based ΣΔ modulators

A 4.5 GHz to 5.8 GHz tunable δσdigital receiver with Q enhancement

A Subsampling Quadrature <formula formulatype="inline"><tex>$\Sigma \Delta$</tex></formula> Modulator Based on Distributed Resonators for Use in Radio Receiver

Contact Info

Product

Resources

About

A 1.3-GHz IF digitizer using a 4/sup th/-order continuous-time bandpass ΔΣ modulator

Cited by 23 publications

References 5 publications

Main defects of LC-based &#x03A3;&#x0394; modulators

Main defects of LC-based &#x03A3;&#x0394; modulators

A 4.5 GHz to 5.8 GHz tunable &#x003B4;&#x003C3;digital receiver with Q enhancement

A Subsampling Quadrature <formula formulatype="inline"><tex>$\Sigma \Delta$</tex></formula> Modulator Based on Distributed Resonators for Use in Radio Receiver

Contact Info

Product

Resources

About

Main defects of LC-based ΣΔ modulators

Main defects of LC-based ΣΔ modulators

A 4.5 GHz to 5.8 GHz tunable δσdigital receiver with Q enhancement