A 2.7 to 4.6 GHz multi-phase high resolution and wide tuning range digitally-controlled oscillator in CMOS 65nm

Gorji, Jafar Gholami; Ghaznavi‐Ghoushchi, M. B.

doi:10.1109/iraniancee.2016.7585794

Cited by 7 publications

(1 citation statement)

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“…The Figure-of-Merit for jitter (FOM jitter ) of the DAC-based and controller-based DCO outperform [8], and they are almost the same with [9]. The [10] is based on the schematic simulation, hence the FOM jitter is better than the proposed designs. The DCO in [11] is designed using 28 nm technology and it uses LC-tank based architecture.…”

Section: Layout and Simulation Resultsmentioning

confidence: 90%

Comparison of System-Level Design Approaches on Different Types of Digitally-Controlled Ring-Oscillator

2021

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This paper presents a comparative study between two different implementations of digitally-controlled-oscillators (DCOs), whcih is the DAC-based and the digital controller-based DCO in TSMC 65 nm CMOS technology. This paper focuses on ring-oscillator architectures due to their high stability against PVT. The DAC-based oscillator implements a differential architecture, and the digital controller-based architecture operates in a single-ended signal. The SFDR of the DAC-based DCO is 77.2 dBc and controller-based DCO is 56.8 dBc at 125 MHz offset. The Monte-Carlo simulation gives a deviation of 7.4% and 8.5% for the DAC-based and controller-based DCO, respectively. The phase noise performance of the DAC-based DCO and controller-based DCO is −78.9 dBc/Hz and −81.3 dBc/Hz at 1 MHz offset, respectively. The implementations are given and compared according to their performance based on post-layout simulation results.

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