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November 2, 2008

Mtg: Design Techniques and CMOS Implementation of a Low Noise Amplifier (LNA)

by @ 7:53 am. Filed under ALL, Communications, Electronics Design, Semiconductors

MONDAY November 3, 2008
SCV Circuits and Systems Chapter, with MTT and SPS
Speaker: Prof. S.S. Jamuar, University Putra Malaysia (An IEEE Circuits and System Society Distinguished Speaker Lecture)
Time: Refreshments at 6:30 PM, 2009 officer elections, Presentation at 7:00 PM
Cost: none
Place: Cadence Design Systems, Building 5, 655 Seely Avenue, San Jose
RSVP: not required

The rapid growth of portable RF communication systems in various standards has led to the demand for one chip to cover several standards such as WCDMA, WLAN, GSM etc.? This leads to the stringent requirements for the RF front-end to cover a large range of different carrier frequencies for all standards.? A receiver system consists of the following circuits: a low noise amplifier, mixer, voltage-controlled oscillator (VCO), intermediate frequency (IF) amplifier and filters.? The low noise amplifier (LNA) is typically the first active stage for the RF front-end.? Its main function is to amplify low signals without adding noise, thus preserving the signal-to-noise ratio (SNR) of the system at low power consumption.? Many tradeoffs are involved in designing the LNA such as noise figure (NF), linearity, gain, impedance matching and power dissipation.? Therefore, proper LNA design considerations and techniques are crucial in todayĆ¢??s communications technology.
This lecture places an emphasis on improved design techniques for the low noise amplifier (LNA). DC biasing techniques, impedance matching techniques, noise matching and stability analysis will be discussed.? Voltage mode design and current mode design techniques will be elaborated.? Variable gain low noise amplifier design techniques will also be discussed.? All the design techniques and simulations presented in the tutorial will be based on EDA tools.

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