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

منو

" A Silicon-Based 0.3 THz Frequency Synthesizer With Wide Locking Range "
Chiang, P; Wang, Z; Momeni, O; Heydari, P

Document Type	:	AL
Record Number	:	911432
Doc. No	:	LA8wg62491
Title & Author	:	A Silicon-Based 0.3 THz Frequency Synthesizer With Wide Locking Range [Article]\ Chiang, P; Wang, Z; Momeni, O; Heydari, P
Date	:	2014
Title of Periodical	:	UC Irvine
Abstract	:	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%).