FSK Modem using PSoC
Y. Sukanya1, Sridivya Pathapati2
1Y.Sukanya, Department of Electronics and Communications Engineering, Vignan’s Institute of Information Technology, Duvvada, Visakhapatnam, Andhra Pradesh, India.
2Sridivya Pathapati, Department of Electronics and Communications Engineering, Vignan’s Institute of Information Technology, Duvvada, Visakhapatnam, Andhra Pradesh, India.
Manuscript received on July 01, 2012. | Revised Manuscript received on July 04, 2012. | Manuscript published on July 05, 2012. | PP: 451-458 | Volume-2, Issue-3, July 2012. | Retrieval Number: C0799062312 /2012©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The trend to low-cost distributed data communications over the switched telephone network has developed the need to integrate even more functions into a single device. Until recently, the baseband to pass band (and vice versa) transformation on the serial data produced by a typical data terminal relied on expensive and bulky external MODEMS to perform that function. This paper will describe the implementation of a single-chip FSK Modem circuit based on a Programmable System on Chip that integrates a modulator, a demodulator, filters, timers and a baud-rate generator to accomplish that transformation. The goal is to demonstrate the possibilities offered by system-on-chip programmable devices in specific processing systems, where the costs make the use of specific integrated circuits unaffordable. A common way of reducing system costs when low baud rates are acceptable is to use an FSK modem. The modem is responsible for both the transmission and reception of the data encoded signal. The device is capable of transmitting and receiving FSK signals in simplex, half-duplex and asymmetrical full-duplex modes over two-wire lines and symmetrical full-duplex signals over four-wire telephone lines. The programming environment of PSoC i.e., PSoC Designer Integrated Development Environment will assist in configuring, source code compiling, building, and debugging the system that runs from internal memory of the PSoC device.
Keywords: FSK, Modem, PSoC, PWM, Programmable.