Quadrature digital-if transmitter without inter-stage saw filter and devices using same

A mobile station for use in a wireless network, the mobile station including radio-frequency (RF) transmission circuitry comprising:

• a digital-to-intermediate frequency (IF) circuit block configured to receive a digital in-phase baseband signal and a digital quadrature baseband signal and to up-convert the digital in-phase and quadrature baseband signals to a digital in-phase IF signal and a digital quadrature IF signal;
• a digital-to-analog (DAC) converter block configured to convert the digital in-phase IF signal and the digital quadrature IF signal to an in-phase analog IF signal and a quadrature analog IF signal respectively;
• and
• an IF-to-RF up-converter block configured to up-convert the analog in-phase IF signal and the analog quadrature IF signal to an RF output,
• wherein the digital-to-IF circuit block comprises pre-compensation circuitry configured to reduce analog impairments associated with the IF-to-RF circuit block and uses a programmable intermediate frequency to avert frequency planning conflicts.