An 18mW 90 to 770MHz synthesizer with agile auto-tuning for digital TV-tuners

An 18mW 90-to-770MHz I/Q synthesizer is fabricated in a 1.2V 0.11mum CMOS process. The architecture is optimized to achieve low power and wide tuning range. A divide-by-3.5 7b VCO with an agile auto-tuning block is included. Phase noise is < -100dBc/Hz at 100kHz offset