A 900 MHz, 3.6 Gb/s bandpass DSM receiver with 55.7 dB two-tone SFDR in 1 MHz bandwidth

Karthaus, U.; Ahles, S.; Maghraby, Ahmed El; Schick, Christoph; Datta, P.K.; Rheinfelder, C.

doi:10.1109/mwsym.2009.5165901

Cited by 6 publications

(11 citation statements)

References 7 publications

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“…This is an improvement of 9 dB over [5]. Figure 7 and Table 1 compare the performance of this circuit to previously published CT BP DSMs.…”

Section: I I M E a S U R E M E N T R E S U L T Smentioning

confidence: 75%

“…[4][5][6][7][8][9][10], most of them using SiGe HBT technology and a single-bit quantizer. Only one of them [4] achieves SNDR and BW suitable for AAS applications, but at a sampling rate of 40 Gb/s, making decimation filtering challenging.…”

Section: B) Circuit Design: Ct Bp Dsm Versus Zero-intermediate Frequementioning

confidence: 99%

“…One difference to [4][5][6][7][8][9][10]13] is the use of two-bit (fourlevel) internal quantization. More than single-bit (two-level) quantization introduces the risk of mismatch between current sources, leading to non-linearity of the DAC.…”

Section: I D E S I G Nmentioning

confidence: 99%

“…Figure 7 and Table 1 compare the performance of this circuit to previously published CT BP DSMs. The plot displays SNR versus bandwidth for [4][5][6][7][8][9][10]. The dashed line indicates a line of constant SNR normalized to 1 MHz bandwidth of 72.1 dB.…”

Section: I I M E a S U R E M E N T R E S U L T Smentioning

confidence: 99%

“…by [5,8,10]. For this purpose, a W-CDMA RF downlink signal has been applied to the DSM of this paper.…”

Section: I I M E a S U R E M E N T R E S U L T Smentioning

confidence: 99%

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A 2-bit, 3.1 GS/s, band-pass DSM receiver for active antenna systems

Karthaus¹,

Ahles²,

Elmaghraby

et al. 2013

Int. J. Microw. Wireless Technol.

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This paper presents a radio frequency (RF) continuous-time band-pass delta sigma modulator (CT BP DSM) receiver realized in a 180 nm SiGe BiCMOS technology. It also provides an introduction to active antenna systems (AAS) for cellular infrastructure base stations, which is the target application for this RF integrated circuit (IC). The internal quantizer and feedback digital to analog converter (DAC) resolution of the CT BP DSM is 2 bit. Without applying DAC linearization techniques such as trimming or dynamic element matching being utilized, measured performance parameters include an SNR and SNDR in 35 MHz bandwidth of 56.7 and 53.7 dB, respectively. IIP3 and noise figure are 26.6 dBm and 10 dB, respectively. No image reception is noticeable within a measurement dynamic range of 83 dB. When driven by single-carrier and three-carrier W-CDMA signals, adjacent channel leakage ratio (ACLR) is 262.6 and 252.1 dB, respectively, making the design also suitable as a modulator for a class-S power amplifier.

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“…This is an improvement of 9 dB over [5]. Figure 7 and Table 1 compare the performance of this circuit to previously published CT BP DSMs.…”

Section: I I M E a S U R E M E N T R E S U L T Smentioning

confidence: 75%