University of Twente Student Theses

Login

Linearization techniques for CMOS Switched-Capacitor Power Amplifiers

Dellink, Mike (2020) Linearization techniques for CMOS Switched-Capacitor Power Amplifiers.

[img] PDF
492kB
Abstract:This paper compares two different linearization techniques for CMOS Switched-Capacitor Power Amplifiers (SCPA), the Clock-overlap method and the Constant Resistance Inverters. The two techniques are compared based on their effect on the output conductance and on the input capacity of the CMOS switches. They are also compared based on their effect on the SCPA AM-AM and AM-PM distortion. An analytical model of the output conductance is derived, which is verified by performing simulations on 130 nm CMOS transistor models in LTspiceXVII. The analytical model is used to analyze the effect of the linearization techniques on the linearity of the SCPA, by analyzing the effect on the AM-AM and AM-PM distortion. It is shown that the Constant Resistance Inverters are more linear than the Clock-overlap method. The maximum deviation of the output conductance is reduced from 15.53 to 4.74 and from 15.53 to 1.1 for the Clock-overlap method and Constant Resistance Inverters, respectively. The input capacity of the Constant Resistance Inverters is 9.7 times higher than the input capacity of the Clock-overlap method. The AM-AM distortion is for both techniques the same and the AM-PM distortions are 4.4 degree and 0.4 degree for the Clock-overlap method and Constant Resistance Inverters, respectively. Index Terms—SCPA, CMOS Inverter, Constant Resistance Inverters, Clock-Overlap Method, Output Conductance, AM-AM, AM-PM, Input Capacity.
Item Type:Essay (Bachelor)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:53 electrotechnology
Programme:Electrical Engineering BSc (56953)
Link to this item:https://purl.utwente.nl/essays/81959
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page