TRF3040 Description
The TRF3040 is an integrated transmit modulator/synthesizer circuit suitable for 900-MHz analog and digital cellular telephones. It consists of a transmit intermediate frequency (TXIF) synthesizer and oscillator, a single-sideband suppressed carrier (SSBSC) converter, a direct conversion I/Q modulator, a variable gain amplifier (VGA) with a power amplifier (PA) driver, a main channel fractional-N synthesizer, an...