Demodulator Flaunts PGA With 24 dB Of Gain Range

Oct. 11, 2007
Compared tosuperheterodyne architectures, a monolithic, high-linearity quadrature demodulator is vowing to reduce the component count of the receive signal chain in third-generation (3G) base stations by at least 75 percent. The TRF3710 demodulator ...

Compared tosuperheterodyne architectures, a monolithic, high-linearity quadrature demodulator is vowing to reduce the component count of the receive signal chain in third-generation (3G) base stations by at least 75 percent. The TRF3710 demodulator integrates a baseband filter that is software-programmable with 1-dB corner frequency. It can continuously cover signal bandwidths of 615 kHz (single-carrier CDMA2000) to 1.92 MHz (single WCDMA carrier). The device includes a programmable gain amplifier (PGA) with 24 dB of gain range in 1-dB increments. In addition, an analog-to-digital-converter (ADC) driver allows for direct connection to the ADC. The device provides a high-linearity receiver and superior RF performance with an input second-order intercept point of +60 dB, input third-order intercept point of +21 dB, and a noise figure of 13.5 dB.

About the Author

Nancy Friedrich | Editor-in-Chief

Nancy Friedrich began her career in technical publishing in 1998. After a stint with sister publication Electronic Design as Chief Copy Editor, Nancy worked as Managing Editor of Embedded Systems Development. She then became a Technology Editor at Wireless Systems Design, an offshoot of Microwaves & RF. Nancy has called the microwave space “home” since 2005.

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