A Highly Linear Cmos Amplifier for Variable Gain Amplifier Applications
نویسندگان
چکیده
This paper reports the design of a highly-linear CMOS amplifier for Variable Gain Amplifier (VGA) applications. A better than –60dB 3rd harmonic distortion at differential output level of 1V peak-to-peak is obtained by utilizing a linearization scheme that does not rely on the active devices. The amplifier maintains 3dB bandwidth over 300MHz. A noise figure at 8.6dB is obtained with source impedance of 200 ohms. It is implemented in standard CMOS 0.25u process and consumes 40mA current under 3.3V power supply.
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