Call For Paper Volume:7 Issue:9 Sep'2020 |

High Frequency CMOS Amplifier with Reduced Non-Linearity

Publication Date : 31/08/2016


DOI : 10.21884/IJMTER.2016.3014.2U5H3

Author(s) :

Venkatesh N P , S Jagannathan .


Volume/Issue :
Volume 3
,
Issue 8
(08 - 2016)



Abstract :

Microwave high power amplifier (HPA) is a main device of wireless systems at the transmitter. It is responsible to increase the power level of the input signal up to certain level necessary for the transmission purposes at higher frequencies. Most of the amplifiers having the property of attenuating and distorting the signals that are required to increase the power level of the input signal. Many new methods have been proposed in recent years to achieve different levels of linearity and efficiency but the drawback was complex circuitry and trade-off between gain and bandwidth. The new technique called negative impedance compensation is introduced in this research for enhancing the linearity and power efficiency of the power amplifier without compromising gain and bandwidth. Feedback amplifier is introduced with main amplifier and the negative impedance is added to the input terminals of the main amplifier and it is analysed by using volterra model. Feedback amplifier and main amplifier is having same structure; hence the complexity of the circuit is reduced. Negative impedance is added to cancel harmonic and inter-modulation distortion. Linearity is measured by plotting gain v/s frequency with and without feedback amplifier. Harmonic and inter-modulation distortion is measured with and without feedback amplifier.


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High Frequency CMOS Amplifier with Reduced Non-Linearity

June 24, 2016