An oversampling-based DTMF generator

Paul O'Leary; Manfred Pauritsch; Franco Maloberti; Giampiero Raschetti

doi:10.1109/26.134006

An oversampling-based DTMF generator

Paul O'Leary
, Manfred Pauritsch
, Franco Maloberti
, Giampiero Raschetti

Research output: Contribution to journal › Article › Research › peer-review

4 Citations (Scopus)

Abstract

A circuit is described which uses one oversampling frequency synthesizer in an interleaved mode to generate dual-tone multifrequency (DTMF) telephone dialing tones. The synthesizer is based on direct digital synthesis using phase accumulation. The digital to analogue conversion is carried out using a first-order sigma-delta converter. This sigma-delta converter requires only a simple second-order RC filter, eliminating the need for a switched capacitor filter.

Original language	English
Pages (from-to)	1189-1191
Number of pages	3
Journal	IEEE Transactions on Communications
Volume	39.1991
Issue number	8
DOIs	https://doi.org/10.1109/26.134006
Publication status	Published - 1 Jan 1991
Externally published	Yes

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10.1109/26.134006

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title = "An oversampling-based DTMF generator",

abstract = "A circuit is described which uses one oversampling frequency synthesizer in an interleaved mode to generate dual-tone multifrequency (DTMF) telephone dialing tones. The synthesizer is based on direct digital synthesis using phase accumulation. The digital to analogue conversion is carried out using a first-order sigma-delta converter. This sigma-delta converter requires only a simple second-order RC filter, eliminating the need for a switched capacitor filter.",

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AU - Raschetti, Giampiero

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N2 - A circuit is described which uses one oversampling frequency synthesizer in an interleaved mode to generate dual-tone multifrequency (DTMF) telephone dialing tones. The synthesizer is based on direct digital synthesis using phase accumulation. The digital to analogue conversion is carried out using a first-order sigma-delta converter. This sigma-delta converter requires only a simple second-order RC filter, eliminating the need for a switched capacitor filter.

AB - A circuit is described which uses one oversampling frequency synthesizer in an interleaved mode to generate dual-tone multifrequency (DTMF) telephone dialing tones. The synthesizer is based on direct digital synthesis using phase accumulation. The digital to analogue conversion is carried out using a first-order sigma-delta converter. This sigma-delta converter requires only a simple second-order RC filter, eliminating the need for a switched capacitor filter.

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An oversampling-based DTMF generator

Abstract

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