A low-power low-noise accurate linear-in-dB variable-gain amplifier with 500-MHz bandwidth

A low-power, wideband signaling receiver for data transmission through a human body was presented in this paper. The receiver utilized a novel implementation of energy-efficient wideband impulse communication that uses the human body as the transmission medium, provides low power consumption, high reception sensitivity. The receiver consists of a low-noise amplifier, active balun, variable gain amplifier (VGA) Gm-C filter, comparator, and FSK demodulator. It was designed with 0.18um CMOS process in an active area of 1.54mm0.414mm. Post-simulation showed that the receiver has a gain range of-2dB~40dB. The receiver consumes 4mW at 1.8V supply and achieves transmission bit energy of 0.8nJ/bit.

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Low noise, low power variable gain amplifier for ultrasounds

2017 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) & 2017 Intl Aegean Conference on Electrical Machines and Power Electronics (ACEMP) ◽

10.1109/optim.2017.7975075 ◽

2017 ◽

Author(s):

Adrian Virgil Craciun

Keyword(s):

Low Power ◽

Low Noise ◽

Variable Gain Amplifier ◽

Variable Gain

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A low-power low-noise accurate linear-in-dB variable gain amplifier with 500 MHz bandwidth

2000 IEEE International Solid-State Circuits Conference Digest of Technical Papers ◽

10.1109/isscc.2000.839827 ◽

2002 ◽

Author(s):

O. Shoji ◽

T. Gaku ◽

T. Hiroshi

Keyword(s):

Low Power ◽

Low Noise ◽

Variable Gain Amplifier ◽

Variable Gain

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A CMOS Low-Power Digital Variable Gain Amplifier Design for a Cognitive Radio Receiver “Application for IEEE 802.22 Standard”

Journal of Circuits System and Computers ◽

10.1142/s0218126618501359 ◽

2018 ◽

Vol 27 (09) ◽

pp. 1850135 ◽

Cited By ~ 2

Author(s):

Sawssen Lahiani ◽

Samir Ben Salem ◽

Houda Daoud ◽

Mourad Loulou

Keyword(s):

Cognitive Radio ◽

Power Consumption ◽

Low Power ◽

High Gain ◽

Low Noise ◽

Constant Current ◽

Variable Gain Amplifier ◽

Low Power Consumption ◽

Radio Receiver ◽

Variable Gain

This paper presents the design of a new Digital Variable Gain Amplifier cell (DVGA). The proposed circuit based on transconductance, gm, amplifier and a transconductance amplifier is analyzed and designed for a cognitive radio receiver. The variable-gain amplifier (VGA) proposed consists of a digital control block, an auxiliary pair to retain a constant current density, and offers a gain-independent bandwidth (BW). A novel cell structure is designed for high gain, high BW, low power consumption and low Noise Figure (NF). The Heuristic Method is used to optimize the proposed circuit performance for high gain, low noise and low power consumption. This circuit is implemented and simulated using device-level description of TSMC 0.18[Formula: see text][Formula: see text]m CMOS process. Simulation results show that the DVGA can provide a gain variation range of 54[Formula: see text]dB (from 54[Formula: see text]dB to 0[Formula: see text]dB) with a 3[Formula: see text]dB BW over more than 110[Formula: see text]MHz. The circuit consumes the maximum power of 0.65[Formula: see text]mW from a 1.8[Formula: see text]V supply.

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