A low-IF RX two-point ΣΔ-modulation TX CMOS single-chip Bluetooth solution

Durdodt, C.; Friedrich, Michael; Grewing, Christian; Hammes, M.; Hanke, A.; Heinen, Stefan; Oehm, J.; Pham-Stabner, D.; Seippel, D.; Theil, D.; Waasen, S. van; Wagner, E.

doi:10.1109/22.942563

Cited by 44 publications

(7 citation statements)

References 4 publications

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“…Further direct coupling from the second harmonic of the PA output signal into the VCO can cause spurs in the transmit signal. In general there are three methods for the generation of FM modulation: i) open loop modulation [2], ii) direct modulation of the VCO and/or PLL [3,4] and iii) IQ-modulation.…”

Section: A Transmitter Requirementsmentioning

confidence: 99%

CMOS Radio with an Integrated 26dBm Power Amplifier for a Complete System-on-Chip Cordless Phone

Grewing

Waasen

Bokinge

et al. 2007

2007 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium

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A fully integrated transceiver in a 0.13µm CMOS technology including on-chip Power Amplifier (PA) for digital cordless telephone standards is presented. The PA exhibits an output power of P OUT = 26dBm. The implemented frequency synthesizer shows robustness against PA coupling, excellent phase noise performance and fast settling time. The fully integrated receiver deploys a low Intermediate Frequency (IF) architecture with a very low noise, low current consumption front-end and a complex band pass filter for channel selection. The receiver is measured to achieve a sensitivity level of P 0.1% = -96dBm. The transceiver uses I TX = 35mA in transmit mode and I RX = 25mA in receive mode from a regulated V TRX = 1.5V supply. The PA shows a power added efficiency (PAE) of more than 30% at a V PA = 2.5V direct-connect-to-battery supply. The transceiver is developed as a part of a complete System-on-Chip (SoC) cordless phone.

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Section: A Transmitter Requirementsmentioning

confidence: 99%

CMOS Radio with an Integrated 26dBm Power Amplifier for a Complete System-on-Chip Cordless Phone

Grewing

Waasen

Bokinge

et al. 2007

2007 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium

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“…For two point modulation loops the loop gain is not the critical parameter. In this modulation scheme a perfect matching of the high-pass modulation port [10] is required. This can also be detected by detecting the step response.…”

Section: Fig 14 Modulated Output Spectrum Without Gain Mismatchmentioning

confidence: 99%

Calibration Technique for ¿¿ Modulation Loops using Radio-Frequency Phase Detection

Sappok

Neyer

Heinen

2005

TENCON 2005 - 2005 IEEE Region 10 Conference

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A novel calibration scheme for predistortion Σ∆ PLLs is proposed in this paper. In contrast to present calibration algorithms this technique offers a digital representation of the high frequency phase characteristic. The architecture uses minimum chip area by synchronously sampling the data content of an asynchronous divider chain. Using this technique to detect the phase difference during a step response allows to determine the real loop gain within 7 µs with an accuracy better than 0.1%. Obtaining this, the deviation from the desired loop gain can be adjusted by a digitally controlled charge pump in order to derive the wanted loop transfer function. This is mandatory for predistortion modulation loops. The architecture is designed by systemtheoretical calculation of the loop behaviour and verified by mixed signal VHDL-AMS simulations.

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“…This leads to the use of calibration loops. Digitization provides size optimization and good stability of the circuit, because it is built with more simple operators such as current sources, switches, capacitor charge/discharge… Inspired by the digitization of some RF blocks and the growing performances of RF-Digital technologies, fully digital architectures are emerging [44,45]. These architectures are separated from digitized ones by the fact that they can be entirely based on structures non-existent with analog blocks.…”

Section: B) Improvement and Digitizationmentioning

confidence: 99%

RF Transmitter Architectures for Nomadic Multi-radio: A Review of the Evolution Towards Fully Digital Solutions

Diet¹,

Robert²,

Baudoin³

et al. 2013

EEENG

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A low-IF RX two-point ΣΔ-modulation TX CMOS single-chip Bluetooth solution

Cited by 44 publications

References 4 publications

CMOS Radio with an Integrated 26dBm Power Amplifier for a Complete System-on-Chip Cordless Phone

CMOS Radio with an Integrated 26dBm Power Amplifier for a Complete System-on-Chip Cordless Phone

Calibration Technique for ¿¿ Modulation Loops using Radio-Frequency Phase Detection

RF Transmitter Architectures for Nomadic Multi-radio: A Review of the Evolution Towards Fully Digital Solutions

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