Experimental Investigation of Noise Suppression Using
the Modified Up-and-Down Method

K. Krmi, V. Ptersons, and V. Plotsi

Institute of Electronics and Computer Science, Dzerbenes str. 14, Riga, LV-1006 Latvia

E-mail: krumins@edi.lv

Received September 3, 2010

Abstract—The noise suppression efficiency is experimentally investigated for discrete stroboscopic
signal transformation providing 5–15 V (RMS) sensitivity. A balanced comparator based on tunnel
diodes is used as a clocked comparator. Ordinary and modified up-and-down methods are used to mea-
sure the instantaneous signal values. The experimental results are compared to the theoretical calcula-
tions.

Keywords: up-and-down method, noise suppression, stroboscopic transformation

DOI: 10.3103/S0146411611010068

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