LP-LV high-performance monolithic DTMF receiver with on-chip test facilities

Diego Vazquez; Gloria Huertas; Maria José Avedillo; Jose María Quintana; Adoracion Rueda; Jose Luis Huertas

doi:10.1117/12.501225

21 April 2003 LP-LV high-performance monolithic DTMF receiver with on-chip test facilities

Diego Vazquez, Gloria Huertas, Maria José Avedillo, Jose María Quintana, Adoracion Rueda, Jose Luis Huertas

Proceedings Volume 5117, VLSI Circuits and Systems; (2003) https://doi.org/10.1117/12.501225
Event: Microtechnologies for the New Millennium 2003, 2003, Maspalomas, Gran Canaria, Canary Islands, Spain

Abstract

Dual Tone Multi-Frequency (DTMF) signalling (also known as Touch-Tone, Tel-Touch,etc.) has gained importance in the world of telecommunications (telephony, answering machines, remote control, credit cards, etc) at the expense of dial-pulse signalling due to its more efficient and higher reliability for transmission of signals. This paper presents a high performance DTMF receiver able to operate in the range of 3V-5V of voltage supply with a low current consumption (<1mA) that is virtually fixed. In addition, on-chip test facilities for the analog part have been incorporated into the chip, in particular: a) a modified opamp (called sw-opamp) has been used to provide external accessing to inputs and outputs of the main analog blocks for off-line test purposes and, b) a Built-In-Self-Test strategy based on converting the analog part into an oscillator (the so-called oscillation-based-test) to perform a structural testing of the architecture. An integrated prototype has been designed and integrated in a 0.6μm technology. The price paid for such on-chip test facilities is very low; concretely, just an extra pin is used, power consumption during normal operation is not penalized and the area overhead is in the order of 7%. The experimental results demonstrate the good performance of the design and the feasibility of the testing approaches.

Citation Download Citation

Diego Vazquez, Gloria Huertas, Maria José Avedillo, Jose María Quintana, Adoracion Rueda, and Jose Luis Huertas "LP-LV high-performance monolithic DTMF receiver with on-chip test facilities", Proc. SPIE 5117, VLSI Circuits and Systems, (21 April 2003); https://doi.org/10.1117/12.501225

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