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This paper describes the transmitter chip and system of Code Division Multiple Access (CDMA) for measurement of electric field intensity. The transmitter chip and system of CDMA is also designed in compliance with IS-95C standard of the Telecommunications Industry Association and the Electronic Industries Association (TIA/EIA/IS-95)and International Mobile Telecommunications 2000 (IMT-2000). Our suggested CDMA system can be uniquely fitted with next generation IMT-2000 without Qualcomm MSM chip. The CDMA system for the measurement of electric field intensity is verified performance using SOC-B (System On Chip-Board) of FPGA plus ASIC and the ASIC chip is followed by fabricating with 0.35 um CMOS technology.