This paper presents a novel chopping method allow-
ing suppression of 1/f flicker noise in continuous-time acquisition
systems without the need for a fixed-frequency clock, stochasti-
cally deriving the chopping signal from the input and hence
achieving completely signal-dependent power consumption. The
method is analysed, its basis of operation explained and a proof-
of-concept implementation presented alongside simulated results
demonstrating an increase in achieved SNR of more than 8 dB
during acquisition of ECG, EAP and EEG signals.