An analog radio front-end chip set for a 1.9 GHz mobile radio telephone application

Sevenhans, J.; Haspeslagh, D.; Delarbre, A.; Kiss, L.; Chang, Zu-yao; Kukielka, J.F.

doi:10.1109/isscc.1994.344734

Cited by 38 publications

(5 citation statements)

References 5 publications

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“…Circuits presented in [4] and [5] are formed by a RC-CR network that requires just one oscillator and output buffers. The main problem with these structures lies in the high power consumption of the buffers.…”

Section: Previous Workmentioning

confidence: 99%

A 900 MHz Multiphase LC Oscillator with Sinusoidal Outputs in SiGe Technology

Regidor

Esper-Chain

Tobajas

et al. 2006

2006 13th IEEE International Conference on Electronics, Circuits and Systems

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In this paper, the implementation of a 900 MHz multiphase oscillator with sinusoidal outputs in SiGe technology is presented. The circuit is based on a differential cross-coupled topology formed by four differential LCoscillators that provide eight output signals with 45º phase differences. The whole circuit was implemented full-custom. The final IC has an area of 1238 µm x 1238 µm and a total power consumption of 75 mW.

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Section: Previous Workmentioning

confidence: 99%

A 900 MHz Multiphase LC Oscillator with Sinusoidal Outputs in SiGe Technology

Regidor

Esper-Chain

Tobajas

et al. 2006

2006 13th IEEE International Conference on Electronics, Circuits and Systems

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“…Finally, a single-stage image rejection processor is used to further eliminate the image signal and obtain the final output signal . From (17) and (18), we observe that the IRR for the output signal is the cube of the IRR for the input signal for each stage of the digital desired/image signal separator. We can calculate the overall IRR for the output signal of the multistage image rejection processor as…”

Section: The Multistage Image Rejection Processormentioning

confidence: 99%

“…Modifying the phaseshift circuit was proposed in [16]. Careful tuning and trimming in the analog circuits was introduced in [17]. A double quadrature downconverter makes the analog circuits more robust with respect to phase mismatch [18], [19].…”

Section: Introductionmentioning

confidence: 99%

On the architecture and performance of a hybrid image rejection receiver

Chen

Huang

2001

IEEE J. Select. Areas Commun.

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This paper describes a hybrid image rejection receiver. The hybrid image rejection receiver contains a modified Hartley image rejection mixer and a digital image rejection processor. The modified Hartley image rejection mixer performs similarly to an original Hartley image rejection receiver but provides two digital outputs. In one output it enhances the desired signal, and in the other output it enhances the image signal. The digital image rejection processor first measures the mismatching effect in the analog devices and then suppresses the image signal by compensating for the mismatching effect. We also propose a simplified implementation method for the hybrid image rejection receiver to reduce its computation complexity. Computer simulation was used to evaluate the performance of this simplified implementation method to include the quantization effect introduced by the A/D converters. Simulation results show that the proposed hybrid image rejection receiver achieves much better performance than the original Hartley image rejection receiver. This architecture greatly relaxes the matching requirements of the analog devices and has a low complexity for an IC implementation.

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“…Here RF-VCO modules do not have such a high market share than in the cellular application. The DECT system bandwith is only 1) zero IF /or very low IF concept with additional baseband filtering and variable gain baseband amplifier in front of the A/D converters: one company has now started production with this concept; 2) dual conversion receiver with an IF 110 MHz and a second IF of 5-6 MHz, with additional passive filtering followed by IF limiter amplifier and demodulator: the receiver part of the first generation was dominated by dual conversion receiver design, and now production is more and more being replaced by a single conversion concept; 3) heterodyn receiver with an IF of 110 MHz and a limiter amplifier and demodulator at this frequency: this concept gets more and more market share, because of its high sensitivity and simple and low-cost application [9], [14]. If the zero-IF or very low concept is used, additional analog baseband gain control, filtering, and processing is required or two additional baseband A/D converters are needed.…”

Section: Dect-rf Development Progressesmentioning

confidence: 99%

Highly integrated RF-IC's for GSM and DECT systems-A status review

Fenk

1997

IEEE Trans. Microwave Theory Techn.

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Enantioselective Organocatalytic Addition of Nitroalkanes to Oxindolylideneindolenines for the Construction of Chiral 3,3-Disubstituted Oxindoles. -The title addition reaction proceeds in the presence of a cinchona-derived urea as the optically active catalyst to give 3,3-disubstituted oxindoles in high yields and excellent enantioselectivties. Product (IX) is employed for the synthesis of the alkaloid (+)-gliocladin C (X). -(HUANG, J.-Z.; WU, X.; GONG*, L

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An analog radio front-end chip set for a 1.9 GHz mobile radio telephone application

Cited by 38 publications

References 5 publications

A 900 MHz Multiphase LC Oscillator with Sinusoidal Outputs in SiGe Technology

A 900 MHz Multiphase LC Oscillator with Sinusoidal Outputs in SiGe Technology

On the architecture and performance of a hybrid image rejection receiver

Highly integrated RF-IC's for GSM and DECT systems-A status review

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