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A one-path subsampling quadrature receiver based on a RD modulator with distributed resonators

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Abstract
This article presents experimental results of a quadrature bandpass sigma-delta modulator based on distributed resonators. The modulator employs transmission lines and transconductors as main components and does not require switches in the loop filter as in the case of switched-capacitor (discrete-time) filters. In addition, the proposed complex modulator does not require a quadrature mixer in the receiver. As main feature, the modulator architecture introduces an innovative way to produce the I and Q outputs that is immune to path mismatch due to the sharing of all the analog circuitry for both paths. The one-bit second-order modulator ADC is able to convert IF signals at fs/2 and 3fs/2 (fs = 50 MHz), achieving an ENOB = 10 bits within a 1 MHz signal bandwidth. Therefore the modulator may be feasible for the typical IF frequencies used in cellular base stations. Furthermore, it provides an image rejection grater than 70 dB. The 0.35 mu m BiCMOS chip consumes 28 mW at 3.3 V supply voltage.
Keywords
Sigma-delta modulation, Quadrature modulator, SIGMA-DELTA MODULATOR, RADIO RECEIVERS, ADC, Transmission-line (TL) resonators, CIRCUIT, MHZ, Analog-to-digital conversion

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Citation

Please use this url to cite or link to this publication:

Chicago
Prefasi, Enrique, Stijn Reekmans, Luis Hernandez, and Pieter Rombouts. 2011. “A One-path Subsampling Quadrature Receiver Based on a RD Modulator with Distributed Resonators.” Analog Integrated Circuits and Signal Processing 68 (2): 233–243.
APA
Prefasi, E., Reekmans, S., Hernandez, L., & Rombouts, P. (2011). A one-path subsampling quadrature receiver based on a RD modulator with distributed resonators. ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, 68(2), 233–243. Presented at the 15th IEEE International Conference on Electronics, Circuits and Systems.
Vancouver
1.
Prefasi E, Reekmans S, Hernandez L, Rombouts P. A one-path subsampling quadrature receiver based on a RD modulator with distributed resonators. ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING. 2011;68(2):233–43.
MLA
Prefasi, Enrique, Stijn Reekmans, Luis Hernandez, et al. “A One-path Subsampling Quadrature Receiver Based on a RD Modulator with Distributed Resonators.” ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING 68.2 (2011): 233–243. Print.
@article{1863817,
  abstract     = {This article presents experimental results of a quadrature bandpass   sigma-delta modulator based on distributed resonators. The modulator employs transmission lines and transconductors as main components and does not require switches in the loop filter as in the case of switched-capacitor (discrete-time) filters. In addition, the proposed complex modulator does not require a quadrature mixer in the receiver. As main feature, the modulator architecture introduces an innovative way to produce the I and Q outputs that is immune to path mismatch due to the sharing of all the analog circuitry for both paths. The one-bit second-order modulator ADC is able to convert IF signals at fs/2 and 3fs/2 (fs = 50 MHz), achieving an ENOB = 10 bits within a 1 MHz signal bandwidth. Therefore the modulator may be feasible for the typical IF frequencies used in cellular base stations. Furthermore, it provides an image rejection grater than 70 dB. The 0.35 mu m BiCMOS chip consumes 28 mW at 3.3 V supply voltage.},
  author       = {Prefasi, Enrique and Reekmans, Stijn and Hernandez, Luis and Rombouts, Pieter},
  issn         = {0925-1030},
  journal      = {ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING},
  keyword      = {Sigma-delta modulation,Quadrature modulator,SIGMA-DELTA MODULATOR,RADIO RECEIVERS,ADC,Transmission-line (TL) resonators,CIRCUIT,MHZ,Analog-to-digital conversion},
  language     = {eng},
  location     = {Malta},
  number       = {2},
  pages        = {233--243},
  title        = {A one-path subsampling quadrature receiver based on a RD modulator with distributed resonators},
  url          = {http://dx.doi.org/10.1007/s10470-011-9614-9},
  volume       = {68},
  year         = {2011},
}

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