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[Products] Demodulator Flaunts PGA With 24 dB Of Gain Range Nancy Friedrich | ED Online ID #17250 | October 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.
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