Publication Type:

Conference Paper

Source:

2015 International Conference on Advances in Computing, Communications and Informatics, ICACCI 2015, Institute of Electrical and Electronics Engineers Inc., SCMS Group of Institutions, Corporate Office CampusPrathap Nagar , Muttom, Aluva, Kochi (Ernakulam)Kerala; India (2015)

ISBN:

9781479987917

URL:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946213379&partnerID=40&md5=5d8ce67ca509ef71123425f88403ebe7

Abstract:

The reversal of the current directions in audio circuit elements causes polarity inversion of the acquired audio signal with respect to the reference input signal. The objective of the work presented in this paper is to implement a simple polarity detection circuit in audio preamplifiers which provides an indication of the signal polarity inversion. The present work also demonstrates the possibilities of polarity inversion in audio circuits of audio data acquisition devices. Inputs fed in the inverting/noninverting terminals of audio operational amplifiers (Op-Amps) cause polarity reversal of the amplitude values of the speech/audio signals. Even though, polarity inversion in audio circuits are perceptually indistinguishable, provides inaccurate values of speech parameters estimated by processing the speech. The work presented in this paper discusses, how polarity inversion is introduced at the circuit level and proposes a polarity detection circuit which provides an indication of polarity reversal after the pre amplification. The effectiveness of the proposed polarity inversion circuit is confirmed by 100 % polarity detection rate for the 100 randomly selected audio files of the CMU-Arctic database when simulated using Proteus 8.0. The paper is concluded by discussing the significance of VLSI implementation proposed polarity detection circuit in the most commonly used audio preamplifier systems. © 2015 IEEE.

Cite this Research Publication

B. Deepak and Govind, D., “Significance of implementing polarity detection circuits in audio preamplifiers”, in 2015 International Conference on Advances in Computing, Communications and Informatics, ICACCI 2015, SCMS Group of Institutions, Corporate Office CampusPrathap Nagar , Muttom, Aluva, Kochi (Ernakulam)Kerala; India, 2015.