Random bit sequence generator

摘要

A random-bit sequence generator comprises a biasing circuit, a source of a noisy voltage signal biased by the biasing circuit, an amplification stage generating an amplified signal representative of the sole AC component of the noisy voltage signal and an output stage electrically in cascade to the amplification stage that generates a random bit sequence in function of the amplified signal. The generator also filters the undesired low-frequency disturbance components because the amplification stage comprises an input low-pass filter that feeds the DC component of the noisy voltage signal to one of the inputs of a differential amplifier, to another input of which is fed the non filtered noisy voltage signal.