World Academy of Science, Engineering and Technology
Published June 23, 2009 | Version 13335
Journal article Open

A SAW-less Dual-Band CDMA Diversity and Simultaneous-GPS Zero-IF Receiver

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Description

We present a dual-band (Cellular & PCS) dual-path zero-IF receiver for CDMA2000 diversity, monitoring and simultaneous-GPS. The secondary path is a SAW-less diversity CDMA receiver which can be also used for advanced features like monitoring when supported with an additional external VCO. A GPS receiver is integrated with its dedicated VCO allowing simultaneous positioning during a cellular call. The circuit is implemented in a 0.25μm 40GHz-fT BiCMOS process and uses a HVQFN 56-pin package. It consumes a maximum 300mW from a 2.8V supply in dual-modes. The chip area is 12.8mm2.

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Additional details

References

  • CDMA2000 Standard 3GPP2 C.S0033.
  • W. Y. Ali-Ahmad, "The CDMA receiver system in a IS-98-A standard," Electronics Engineer, July 2000.
  • H. Waite et al., "A CDMA2000 zero-IF receiver with low-leakage integrated front-end," IEEE JSSC, pp. 1175-1179, July 2004.
  • O. Charlon et al, "A dual-mode zero-IF receiver for dual-band CDMA cellular and GPS," IEEE ESSCIRC, pp. 432-435, Sept. 2007.
  • Y. Xu et al., "A low-IF CMOS simultaneous GPS receiver integrated in a multimode transceiver," IEEE CICC, pp. 107-110, 2007.