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This invention for the first time provides a technique for concurrent signal generation and frequency tuning that enables both high output power and tuning capability.
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Description This invention for the first time provides a technique for concurrent signal generation and frequency tuning that enables both high output power and tuning capability at sub-mm wave frequencies. While power generation and tuning range typically have to trade off in conventional systems, Cornell inventors have developed a novel architecture that decouples power generation from frequency tuning and enables a tunable signal source at frequencies above the cut-off frequency of the process. The new architecture consists of a loop of coupled oscillators. The loop dynamics are adjusted to ensure the desired harmonic from all core oscillators are in phase and combined at the output node. A prototype 283-296 GHz source was implemented in a 65nm CMOS process resulting in a peak output power of 0.76mW. This technology has potential to enable CMOS signals in applications for sub-mm-wave and terahertz frequencies including medical imaging, spectroscopy and communication systems.