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 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

RF Product Marketing Manager for Aerospace Defense, Keysight Technologies

Nancy Friedrich is RF Product Marketing Manager for Aerospace Defense at Keysight Technologies. Nancy Friedrich started a career in engineering media about two decades ago with a stint editing copy and writing news for Electronic Design. A few years later, she began writing full time as technology editor at Wireless Systems Design. In 2005, Nancy was named editor-in-chief of Microwaves & RF, a position she held (along with other positions as group content head) until 2018. Nancy then moved to a position at UBM, where she was editor-in-chief of Design News and content director for tradeshows including DesignCon, ESC, and the Smart Manufacturing shows.