Chips for a Direct Sequence Spread Spectrum transmitter ? - RF Cafe Forums
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Post subject: Chips for a Direct Sequence Spread Spectrum transmitter ? Posted: Fri Feb 13, 2009 6:50 am
Joined: Mon Feb 09, 2009 12:26 pm
Looking for parts to implement a Direct Sequence Spread Spectrum transmitter. Ideally a single-chip solution would be nice. Not sure about frequency or chip rates etc yet. Just looking for some parts to start with.
Post subject: Re: Chips for a Direct Sequence Spread Spectrum transmitter ?Posted: Thu May 14, 2009 11:45 am
Joined: Thu Oct 12, 2006 7:50 am
Try looking at Cypress Semiconductor. They have a line of 2.4 GHz ICs for FHSS and DSSS.
2.4 GHz CyFi™ Transceiver
2.4 GHz Direct Sequence Spread Spectrum (DSSS) Radio Transceiver
Operates in the unlicensed worldwide Industrial, Scientific, and Medical (ISM) band (2.400 GHz to 2.483 GHz)
21 mA Operating Current (Transmit at -5 dBm)
Transmit Power Up to 4 dBm
Receive Sensitivity up to -97 dBm
Sleep Current less than 1 µA
DSSS Data Rates up to 250 kbps, GFSK Data Rate of 1 Mbps
Low External Component Count
Auto Transaction Sequencer (ATS) - no MCU intervention
For more, see pdf
The CYRF7936 IC is designed to implement wireless device links operating in the worldwide 2.4 GHz ISM frequency band. It is intended for systems compliant with worldwide regulations covered by ETSI EN 301 489-1 V1.41, ETSI EN 300 328-1 V1.3.1 (Europe), FCC CFR 47 Part 15 (USA and Industry Canada), and TELEC ARIB_T66_March, 2003 (Japan).
The CYRF7936 contains a 2.4 GHz CyFi radio modem which features a 1 Mbps GFSK radio front-end, packet data buffering, packet framer, DSSS baseband controller, and Received Signal Strength Indication (RSSI). CYRF7936 features a SPI interface for data transfer and device configuration.