Electronic engineering

Engineering

Artificial intelligence

Telecommunications

Physics

Transistor

Wideband

Impedance matching

Channel (broadcasting)

CMOS

Image (mathematics)

Effective input noise temperature

Low-noise amplifier

Voltage

Amplifier

Computer science

Noise (video)

Noise figure

Resistor

Y-factor

Active noise control

Electrical engineering

Bandwidth (computing)

Electrical impedance

IEEE Transactions on Circuits & Systems II Express Briefs

A wideband noise-cancelling low-noise amplifier (LNA) combining resistor feedback and source-follower feedback (SFF) is proposed. The SFF facilitates upsizing of the feedback resistor to improve the gain and noise figure (NF), without compromising the input-impedance matching. Another benefit is that the noise contributions of both the feedback resistor and noise-cancelling transistors are significantly reduced. Fabricated in 65-nm CMOS, the LNA exhibits a voltage gain of 16.8 dB, and a flat NF of 3.3 ± 0.45 dB over a -3-dB bandwidth of 0.5 to 7 GHz. The power consumption is 11.3 mW at 1.2 V, and the die area is 0.044 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> .

A 0.044-mm<sup>2</sup> 0.5-to-7-GHz Resistor-Plus-Source-Follower-Feedback Noise-Cancelling LNA Achieving a Flat NF of 3.3±0.45 dB

A 0.044-mm2 0.5-to-7-GHz Resistor-Plus-Source-Follower-Feedback Noise-Cancelling LNA Achieving a Flat NF of 3.3±0.45 dB

A 0.044-mm² 0.5-to-7-GHz Resistor-Plus-Source-Follower-Feedback Noise-Cancelling LNA Achieving a Flat NF of 3.3±0.45 dB