Flexible Baseband Analog Circuits for Software-Defined Radio Front-Ends

Giannini, Vito; Craninckx, Jan; D'Amico, S.; Basçhirotto, A.

doi:10.1109/jssc.2007.899103

Cited by 138 publications

(45 citation statements)

References 25 publications

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“…Figure 4 (b) represents the small signal analysis of one half of the circuit where small signal gain ( ), pole frequency ( ) and gain bandwidth ( ) of the amplifier can be estimated as shown in equation (6)(7)(8)(9). Here in Table.4 reference [2 ], [7] and [9] has constructed Gm-C filter with 3 V, 1.25 V and 1.8 V of power supply without independent tuning of and Q. Reference [10] has independent tuning of and Q but the used supply voltage of 4 V. The proposed filter has just 1 V of power supply while supporting independent electronic tuning of and Q.…”

Section: Low Voltage Operational Transconductance Amplifiermentioning

confidence: 99%

“…Software Defined Radio (SDR) has emerged to address this issue which supports multi-standard reception by tuning to any carrier frequency and selection of any channel bandwidth. Its key performances are defined by software and the goal is to push the digital domain as near as possible to the antenna [1][2][3][4]. Different architectures of multi-standard receiver exists in the literatures and in practice.…”

Section: Introductionmentioning

confidence: 99%

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A Low Voltage Tunable Filter for Analog Baseband of Software Defined Radios

Basnet¹,

Bang²,

Song³

et al. 2016

IJCA

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Section: Low Voltage Operational Transconductance Amplifiermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Low Voltage Tunable Filter for Analog Baseband of Software Defined Radios

Basnet¹,

Bang²,

Song³

et al. 2016

IJCA

View full text Add to dashboard Cite

show abstract

“…The requirements in terms of noise and linearity for the analog baseband channel processing depend, of course, on the decisions taken in the link budget analysis for the entire receiver. In addition to that, an adaptive integrated noise level may lead to a further power saving in case a smaller signal-to-noise ratio (SNR) is required [17]. Adaptive control to provide flexible frequency discrimination and gain control may currently be met with better overall performance by employing proper tunable analog circuits.…”

Section: Flexible Baseband Analog Circuitsmentioning

confidence: 99%

Software‐Defined Radio Front Ends

Hueber¹,

Staszewski

2010

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

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The ultimate dream of every software-defined radio (SDR) front-end architect is to deliver a radio-frequency (RF) transceiver that can be reconfigured into every imaginable operating mode, in order to comply with the requirements of all existing and even upcoming communication standards. These include a large range of modes for cellular (2G-2.5G-3G and further), WLAN (802.11a/b/g/n), WPAN (Bluetooth, Zigbee, etc.), broadcasting (DAB, DVB, DMB, etc.), and positioning (GPS, Galileo) functionalities. Obviously, each of them has different center frequency, channel bandwidth, noise levels, interference requirements, transmit spectral mask, and so on. As a consequence, the performances of all building blocks in the transceiver must be reconfigurable over an extremely wide range, requiring ultimate creativity from the SDR designer.Reconfigurability is a requirement for SDR functionality, but often one forgets that it can also be an enabler for low power consumption. Indeed, once flexibility is built into a transceiver, it can be used to adapt the performance of a radio to the actual circumstances instead of those implied by the worst-case situation of the standard. Since linearity, filtering, noise, bandwidth, and so on, can be traded for power consumption in the SDR, a smart controller is able to adapt the radio at runtime to the actual performance required, and hence can reduce the average power consumption of the SDR.In this chapter, several important innovations and concepts are presented that bring this ultimate dream closer to reality. These include circuits for wideband local oscillator (LO) synthesis, multifunctional receiver and transmitter blocks, and novel ADC (analog-to-digital converter) implementations. The result of all this is integrated in the world's first SDR transceiver covering the frequency range from 174 MHz to 6 GHz, implemented in a 1.2-V 0.13-µm CMOS technology.

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“…Modern mobile transceivers should comply with a multitude of existing or developing wireless standards as the industry shifts to the software-defined radio (SDR) technology [1,2]. Due to its simplicity, direct conversion transceiver architecture is best suited for SDR implementation [3].…”

Section: Introductionmentioning

confidence: 99%

A Method for Continuous Tuning of MOSFET–RC Filters with Extended Control Range

Kiela

Navickas

2016

Journal of Electrical Engineering

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In this paper a tuning structure for a MOSFET?RC filters is presented. The proposed tuning structure is composed of switched resistor banks with voltage controlled transistors. The voltage controlled transistors use active feedback with extended control range for continuous filter parameter tuning, without degrading the total linearity performance of the filter.The proposed tuning structure is tested by implementing it in a second order low pass biquadratic filter cell in 65 nm CMOS technology. The designed filter has a highly reconfigurable response, ranging from Chebyshev to Bessel, a tuneable -3 dB bandwidth from 10 MHz to 100 MHz and can be used for multiple standard wireless solutions. Filter IIP3 performance is not degraded when the bandwidth is continuously tuned by 40 % with a 1 V pp input. The maximum power dissipation, including active feedback circuits, is 17.2 mW from a 1.2 V source when the filter is tuned to 100 MHz bandwidth.

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Flexible Baseband Analog Circuits for Software-Defined Radio Front-Ends

Cited by 138 publications

References 25 publications

A Low Voltage Tunable Filter for Analog Baseband of Software Defined Radios

A Low Voltage Tunable Filter for Analog Baseband of Software Defined Radios

Software‐Defined Radio Front Ends

A Method for Continuous Tuning of MOSFET–RC Filters with Extended Control Range

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