Flash analog-to-digital converter

A flash analog-to-digital converter for converting an analog input signal to a digital output code that is representative of the input signal, said analog-to-digital converter comprising a circular resistive string of substantially equal valued resistors and powered by a reference voltage source for providing a plurality of equidistant reference voltages, a set of comparators for comparing the analog input signal with said plurality of reference voltages, an encoder receiving the result of the set of comparators and deriving therefrom the digital output code and a switching circuit arranged and controlled to perform a mismatch mitigating algorithm, characterized in that the switching circuit is arranged between said reference voltage source and the resistive string to switch the reference voltage source at different clock cycles across different parts of the string, wherein each of said parts comprises a fixed number of resistors.

A flash analog-to-digital converter for converting an analog input signal to a digital output code that is representative of the input signal, said analog-to-digital converter comprising a linear resistive string of substantially equal valued resistors and powered by a reference voltage source for providing a plurality of equidistant reference voltages, a set of comparators for comparing the analog input signal with said plurality of reference voltages, an encoder receiving the result of the set of comparators and deriving therefrom the digital output code and switching means arranged and controlled to perform a mismatch mitigating algorithm, characterized in that the switching means are arranged between said reference voltage source and the resistive string to switch the reference voltage source at different clock cycles across different parts of the string, in a systematic manner wherein each of said parts comprises a fixed number of resistors.

A flash analog-to-digital converter for converting an analog input signal to a digital output code that is representative of the input signal, said analog-to-digital converter comprising a resistive string of substantially equal valued resistors and powered by a reference voltage source for providing a plurality of equidistant reference voltages, a set of comparators for comparing the analog input signal with said plurality of reference voltages, an encoder receiving the result of the set of comparators and deriving therefrom the digital output code and switching means arranged and controlled to perform a mismatch mitigating algorithm, characterized in that the switching means are arranged between said reference voltage source and the resistive string to switch the reference voltage source at different clock cycles across different parts of the string, in a non-arbitrary manner wherein each of said parts comprises a fixed number of resistors.