Single chip GSM/EDGE transceiver architecture with closed loop power control

A portable transceiver having a single chip GSM/EDGE transceiver, comprising:

• a receiver comprising a fully differential receive chain;
• a subharmonic mixer in the receive chain, the subharmonic mixer configured to receive a radio frequency (RF) input signal and a local oscillator (LO) signal that is phase-shifted by a nominal 45 degrees;
• a synthesizer comprising a voltage controlled oscillator and at least one frequency divider to generate desired transmit and receive LO signals, the synthesizer further comprising a phase combiner configured to develop the 45 degree nominally phase-shifted LO signals from a single voltage controlled oscillator (VCO);
• a transmitter having a closed power control loop;
• and a harmonic rejection modulator, the use thereof made possible by a frequency plan designed to allow the synthesizer to develop the transmit and receive LO signals without a frequency multiplier, wherein the receiver, synthesizer and transmitter are co-located on a common die.