Abstract
Tow different computer calculation methods for distortion of the wide-band diode bridge track and hold amplifier (THA) are presented based on a high frequency Schottky diode model. One of the computer programs calculates the distortion of weekly nonlinear THA based on the KCL and the nonlinear-current method. The other calculates the weekly nonlinear distortion by using a Volterra series method and a nodal formulation. Comparative calculation results for the diode bridge THA have shown good agreement with these two computer program calculation methods, whereas the overall computational efficiency of the nonlinear-current method is better than that of the nodal formulation method in a special evaluation.
Highlights
A diode bridge architecture track and hold amplifier (THA) prior to the analog to digital converters are used to implement low-cost ultra high speed transceivers
Two computer programs based on these methods are implemented to evaluate the distortion of THA with an improved procedure in terms of the Volterra series
Two computer program are used to calculate the weakly nonlinear distortion of the diode bridge switch THA based on the high frequency Schottky diode model in terms of a Volterra-series analysis
Summary
A diode bridge architecture THA prior to the analog to digital converters are used to implement low-cost ultra high speed transceivers. It is crucial to predict and calculate the distortion in the weakly nonlinear circuit by computer program calculation or simulation. Two computer programs based on these methods are implemented to evaluate the distortion of THA with an improved procedure in terms of the Volterra series. Two computer program are used to calculate the weakly nonlinear distortion of the diode bridge switch THA based on the high frequency Schottky diode model in terms of a Volterra-series analysis.
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