A Direct Conversion Receiver with Fast-Settling DC Offset Canceller

Okuni, Hidenori; Ito, Ryoko; Yoshida, Hiroshi; Itakura, Tetsuro

doi:10.1109/pimrc.2007.4394571

Cited by 6 publications

(5 citation statements)

References 6 publications

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“…As a result, the equivalent output resistance R outIF and the transfer function of DC offset will stay the same during calibration and operation. And the DCOC method should be repeated according to the LO frequency and the gain at a selected temperature [17,23].…”

Section: Offset Mechanismmentioning

confidence: 99%

“…5. Missing codes are not allowed in SAR algorithm [17]. So the differential nonlinearity (DNL) of the DAC must be less than 1 LSB.…”

Section: Circuits Designmentioning

confidence: 99%

“…Besides, some methods operate in real time and eliminate DC offset through digital filter. These methods suffer from signal distortion and large consumption of digital resources [16,17].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An effective DC offset calibration method combined with analog and digital circuits for direct conversion receivers

Wang¹,

Fan

Shen³

et al. 2019

IEICE Electron. Express

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This paper presents a DC offset calibration (DCOC) method combined with analog and digital circuits for direct conversion receivers. To work effectively, the LNA is shut off for better isolation and replaced by an equivalent resistance to keep the same transfer function of DC offset between calibration and operation. This method adopts DACs to compensate DC offset, then averages and eliminates the residual DC offset in the digital domain. Measurements show that this DCOC method achieves 0.44 mV DC offset and improves IM2 by 10 dB. The DCOC circuits occupy 0.23 mm 2 in 40 nm CMOS and consume 124 µA at 1.3 V supply.

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Section: Offset Mechanismmentioning

confidence: 99%

“…5. Missing codes are not allowed in SAR algorithm [17]. So the differential nonlinearity (DNL) of the DAC must be less than 1 LSB.…”

Section: Circuits Designmentioning

confidence: 99%

See 1 more Smart Citation

An effective DC offset calibration method combined with analog and digital circuits for direct conversion receivers

Wang¹,

Fan

Shen³

et al. 2019

IEICE Electron. Express

View full text Add to dashboard Cite

show abstract

“…It is well known that direct-conversion mixer suffers from DC-offset due to self-mixing and mismatch between mixer components. Many DC-offset cancellation schemes have been proposed [8] that deal with unwanted DC-offset which decreases the sensitivity of the receiver. In that case we included a DC blocking at the intermediate frequency (IF) port of the mixer to both eliminate the DC component and restore mid-point of signal swing.…”

Section: Wireless Mmw Link Setupmentioning

confidence: 99%

Short-range point-to-point gigabit wireless transmission at 50 GHz

Man¹,

Rose²,

Osman³

et al. 2009

2009 IEEE 9th Malaysia International Conference on Communications (MICC)

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In this paper, we present a short-range point-to-point gigabit wireless transmission at 50 GHz utilising prototypes of simple transmitter and receiver front-ends. The particular prototypes have been assembled from millimetre-wave (MMW) components with WR15 and coaxial ports.The MMW transmitter generates an amplitude shift keying (ASK) modulated signal by mixing a polar non-return-zero (NRZ) of pseudo-random binary sequence (PRBS) with a word length of 2 11 -1 and a local oscillator (LO) signal of 50 GHz. MMW coherent receiver with a low-pass filter has been employed to demodulate the ASK signal. For the digital baseband transmission at 50GHz, a BER of 10 -11 has been achieved for 3.125Gbps wireless transmission with received RF power greater than -61dBm. The prototype MMW receiver imposes 3dB sensitivity penalty when bit rate is increased from 2.125 to 3.125Gbps.

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“…At the same time, this method is more suitable for the measurement of the dynamic characteristics of the fast changing signals, such as the rising edge of the pulse signal, the rate of change of the slope, the linearity of the signal change, and so on. In the processing of these problems, the conventional sampling number and sampling rate are contradictory, while the approach could make the low-bit ADC [36] with high conversion rate obtain high precision measurement. This will provide a better measurement method for measuring the dynamic multi-fuzzy zone formed by the limited resolution of the measure object, [11] improving the accuracy in the measurement and control.…”

Section: Introductionmentioning

confidence: 99%

ADC border effect and suppression of quantization error in the digital dynamic measurement

Bai¹,

Liu²,

Zhou³

et al. 2017

Chinese Phys. B

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The digital measurement and processing is an important direction in the measurement and control field. The quantization error widely existing in the digital processing is always the decisive factor that restricts the development and applications of the digital technology. In this paper, we find that the stability of the digital quantization system is obviously better than the quantization resolution. The application of a border effect in the digital quantization can greatly improve the accuracy of digital processing. Its effective precision has nothing to do with the number of quantization bits, which is only related to the stability of the quantization system. The high precision measurement results obtained in the low level quantization system with high sampling rate have an important application value for the progress in the digital measurement and processing field.

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A Direct Conversion Receiver with Fast-Settling DC Offset Canceller

Cited by 6 publications

References 6 publications

An effective DC offset calibration method combined with analog and digital circuits for direct conversion receivers

An effective DC offset calibration method combined with analog and digital circuits for direct conversion receivers

Short-range point-to-point gigabit wireless transmission at 50 GHz

ADC border effect and suppression of quantization error in the digital dynamic measurement

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