Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11262842 | AEU - International Journal of Electronics and Communications | 2018 | 21 Pages |
Abstract
In millimeter wave systems, performance degradation mainly occurs due to high phase noise of voltage-controlled oscillators (VCOs). This paper proposes a low power, low phase noise ring-VCO developed for ultra-wide band applications identified for possible 5G usage. For this purpose, a novel differential symmetrical load delay cell based 3-stage ring oscillator has been introduced to design the ring-VCO. The 28â¯nm CMOS Fully Depleted Silicon On Insulator (FDSOI) technology is adopted for designing this VCO circuit with 1â¯V power supply while a new voltage control through the transistor body bias is implemented. The simulated results show that the proposed oscillator works in the tuning range of 29-49â¯GHz and dissipates 3.75 mW of power. It exhibits a phase noise of â129.2âdBc/Hz at 1â¯MHz offset from 49â¯GHz oscillation frequency, and a remarkable Figure of Merit (FoM) of â217.26 dBc/Hz. With similar power supply, the phase noise rises to â93.16 dBc/Hz for a second oscillator involving more of active components exactly 9 delay cells. Further, the impact of the operation temperature variation on the VCO performance is investigated. Results show a drift in the oscillation frequency for a temperature step from 27 °C to 40 °C and a degradation of 3dBc in the phase noise performance.
Keywords
Related Topics
Physical Sciences and Engineering
Computer Science
Computer Networks and Communications
Authors
Mouhammad Abou Chahine, Hussein Bazzi, Ali Mohsen, Adnan Harb, Abdallah Kassem,