A Silicon-Based 0.3 THz Frequency Synthesizer With Wide Locking Range

作者：Chiang Pei Yuan^*; Wang Zheng; Momeni Omeed; Heydari Payam

来源：IEEE Journal of Solid-State Circuits, 2014, 49(12): 2951-2963.

DOI：10.1109/JSSC.2014.2360385

• Active varactor
• Colpitts
• frequency generation
• frequency synthesizer
• injection-locked divider
• multi-phase injection
• phase-locked loop (PLL)
• terahertz
• ring oscillator
• triple-push VCO

A 300 GHz frequency synthesizer incorporating a triple-push VCO with Colpitts-based active varactor (CAV) and a divider with three-phase injection is introduced. The CAV provides frequency tunability, enhances harmonic power, and buffers/injects the VCO fundamental signal from/to the divider. The locking range of the divider is vastly improved due to the fact that the three-phase injection introduces larger allowable phase change and injection power into the divider loop. Implemented in 90 nm SiGe BiCMOS, the synthesizer achieves a phase-noise of -77.8 dBc/Hz (-82.5 dBc/Hz) at 100 kHz (1 MHz) offset with a crystal reference, and an overall locking range of 280.32-303.36 GHz (7.9%).

• 出版日期2014-12