I/Q LC oscillators with an octave tuning range for TV on mobile platforms

Two I/Q oscillators have been realized that cover a one octave tuning range, and, when combined with a divider and a multiplexer, cover the complete TV band. The realized oscillators embody highly cost-effective key building blocks for tuning systems in consumer ICs for TV on portable platforms. The resonators consist of bond-wires, 8 bit capacitor banks and varactors. One I/Q LC oscillator is realized with integrators, and achieves a tuning range of 412-880 MHz (107% of an octave), and its phase-noise-to-carrier ratio, L(f_m), varies from -101 dBc/Hz to -110 dBc/Hz at 500 kHz offset. Its power dissipation is 35 mW (at 3 V). A second I/Q oscillator is coupled with V/I converters that implement a high-pass function. Its tuning range is 417-836 MHz (102%), L(500 kHz) varies between -111 dBc/Hz and -115 dBc/Hz, with a power dissipation of 23 mW. Both oscillators are realized in an 8 GHz f_T/0.6 μm BiCMOS process.