Testing method of DTMF circuits for telephony

Krzysztof Burakowski; Dorota Mrozowska; Jerzy Zajac

doi:10.1117/12.131018

1 August 1992 Testing method of DTMF circuits for telephony

Krzysztof Burakowski, Dorota Mrozowska, Jerzy Zajac

Proceedings Volume 1783, International Conference of Microelectronics: Microelectronics '92; (1992) https://doi.org/10.1117/12.131018
Event: International Conference on Microelectronics, 1992, Warsaw, Poland

Abstract

In the paper, the testing method of DTMF circuits applied for dialing signal generation in telecommunication systems is described. The method enables determining: frequency, amplitude, and harmonic distortions of DTMF signals generated by tested integrated circuit. It was developed by the authors. Application of digital IIR filters and Fourier transform provides good accuracy and constant metrological parameters of the test system in connection with short test time. As a result of the developed method, the automatic telephone test system TAT- 92 controlled by a personal computer is designed. This paper describes the problem, the solution, and the comparison of new method and classical method, based on analog filters.

Citation Download Citation

Krzysztof Burakowski, Dorota Mrozowska, and Jerzy Zajac "Testing method of DTMF circuits for telephony", Proc. SPIE 1783, International Conference of Microelectronics: Microelectronics '92, (1 August 1992); https://doi.org/10.1117/12.131018

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