Title :
A low-power microphone preamplifier with EMI canceling
Author :
Reitsma, G.P. ; Kouwenhoven, M.H.L. ; Mosterd, A.
Author_Institution :
Delft University of Technology, Delft, Netherlands
Abstract :
A low-power transadmittance amplifier is presented, that suppresses EMI by suppression of the detection mechanism as well as a compensation technique. The detection is suppressed by cancellation of the even harmonics. Compensation is achieved with the help of a dummy amplifier that reproduces the disturbance. The presented measurement results show that especially the compensation suppresses the EMI quite well.
Keywords :
Electromagnetic interference; Microphones; Preamplifiers;
Conference_Titel :
Solid-State Circuits Conference, 2000. ESSCIRC '00. Proceedings of the 26rd European
Conference_Location :
Stockholm, Sweden
