A 10 Gb/s Inductorless AGC Amplifier With 40 dB Linear Variable Gain Control in 0.13 $\upmu \text{m}$ CMOS

Ray, Sagar; Hella, Mona M.

doi:10.1109/jssc.2015.2496782

Cited by 58 publications

(25 citation statements)

References 19 publications

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“…Thus, the voltage gain variation ΔG generated from ΔVctr can be expressed as (8), which is of dB-linear tuning characteristic.…”

Section: Current Source Regulatormentioning

confidence: 99%

“…Large DR and accurate gain control are both achieved in the scheme. In addition, the architecture of an R-2R attenuator network with multi-stage variable gain amplifiers (VGA) [7,8] are performed in the design to achieve broadband response that frequencies range from 0.8 to 2.7 GHz [9]. The proposed AGC scheme is applied in RF VGA, Mixer and IF VGA, which means tuning the signal at RF frequency and IF frequency synchronously and optimizing the system signal-to-noise ratio (SNR) in an effective method.…”

Section: Introductionmentioning

confidence: 99%

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A novel AGC scheme in a wideband receiver

Huang

Lin

Zhou

et al. 2018

IEICE Electron. Express

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Abstract:A new automatic gain control (AGC) scheme in a wideband wireless receiver is presented in this paper. The proposed AGC scheme consists a receiver architecture with tuning the gain of RF amplifier, mixer and IF amplifier synchronously, and a novel exponential function current generator to achieve dB-linear gain control characteristic. Fabricated on a 0.18um BiCMOS process, the proposed receiver provides a conversion gain dynamic range of 72 dB with the gain ripple of 5 dB that range from 0.8 to 2.7 GHz. At maximum gain operation, the noise figure of 9.9 dB and -25 dBm of third-order input intercept point are measured at 2.7 GHz. The chip draws 27 mW from a 1.8 V power supply and occupies an area of 2.8 mm 2 . Keywords: automatic gain control (AGC), receiver, dB-linear, wideband Classification: Integrated circuits [11] J. Wang, Y. Zheng, F. Yang, F. Tian and H. Liao: "A wide band CMOS radio frequency RMS power detector with 42-dB dynamic Range," IEEE

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“…Thus, the voltage gain variation ΔG generated from ΔVctr can be expressed as (8), which is of dB-linear tuning characteristic.…”

Section: Current Source Regulatormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A novel AGC scheme in a wideband receiver

Huang

Lin

Zhou

et al. 2018

IEICE Electron. Express

View full text Add to dashboard Cite

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“…The optical input power of the receiver varies over a wide dynamic range, which depends on the variations of the transmission distance, transmitted laser power, loss of the fibre, and efficiency of the PD [4,5,6,7,8,9,10]. An automatic gain control (AGC) circuit, which varies the transimpedance gain, has been widely used to prevent the TIA from being overdriven at high input power, leading to improvements in jitter behaviour and sensitivity [11,12,13,14]. For high-speed TIA, achieving maximum bit rates requires a flat response of the magnitude of the transimpedance within the frequency range of interest.…”

Section: Introductionmentioning

confidence: 99%

A 25-Gb/s high-sensitivity transimpedance amplifier with bandwidth enhancement

Luo

Chen³

et al. 2020

IEICE Electron. Express

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“…or digital. For the first category [2]- [4], the power detector and the loop filter are typically based on the analog circuit. For the second category [5]- [7], the power detector and the loop filter are typically based on the digital circuit.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Mitigation of ICI Due to Gain Adjustment in OFDM Systems

2019

IEEE Access

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Automatic gain control (AGC) is widely adopted in orthogonal frequency division multiplexing (OFDM) systems to compensate the significant variation of the received signal. In OFDM systems, the duration of the cyclic prefix (CP) is usually equal to the delay spread of the channel to minimize the system overhead. The inter-symbol interference (ISI) between consecutive OFDM symbols spreads over a large portion of the CP. The CP contaminated by the ISI should not be used to estimate the received power. If the duration of the remaining CP is shorter than the settling time of the AGC, then the gain adjustment will be carried out within the useful portion of the OFDM symbol. The subcarrier orthogonality is lost and the system performance is degraded by the resulting inter-carrier interference (ICI). In this paper, we propose a simple and efficient scheme to mitigate the ICI. The proposed scheme can be easily implemented in actual systems because of its low computational complexity. The simulation results show that the proposed scheme can increase the signal-to-interference-plus-noise ratio significantly compared to the traditional scheme.INDEX TERMS Automatic gain control, inter-carrier interference, inter-symbol interference, orthogonal frequency division multiplexing.

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A 10 Gb/s Inductorless AGC Amplifier With 40 dB Linear Variable Gain Control in 0.13 $\upmu \text{m}$ CMOS

Cited by 58 publications

References 19 publications

A novel AGC scheme in a wideband receiver

A novel AGC scheme in a wideband receiver

A 25-Gb/s high-sensitivity transimpedance amplifier with bandwidth enhancement

Analysis and Mitigation of ICI Due to Gain Adjustment in OFDM Systems

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