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FSK Modulator / Demodulator

Question asked by pavan on Dec 13, 2012
Latest reply on Dec 13, 2012 by enash

We are working on a Saftey critical system for which we have below requirement. This system is like RFID communication.i.e inductive power and data transfer(Near field communication) with frequencies 27Mhz and 4Mhz respectively. We need

1.  Low power FSK modulator and demodulator with frequencies of 3.9Mhz for logical '0' and 4.2Mhz for logical '1'. Required bit rate for data transfer is 546Kbps.

2. Kind of ICs which are used in RFID tags for rectification and regulation of induced voltage, which will be used for powering the control circuit for data transfer.

Please suggest the suitable parts for our application. We are unable to find any FSK modulator / demodulator ics with the above requirement.

Is there any alternate method for FSK modulation / demodulation with VCOs / PLLs?