[paper] Low Power Low Jitter 0.18 CMOS Ring VCO Design with Strategy Based on EKV3.0 Model

Amine AYED and Hamadi GHARIANI

LETI Laboratory-ENIS

Sfax, Tunisia

IJACSA Vol. 8, No. 12, 2017

Abstract—In this paper, the design of micro-power CMOS ring VCO with minimum jitter intended for a concept of frequency synthesizer in biotelemetry systems is studied. A design procedure implemented in MATLAB is described for a circuit realization with TSMC 0.18μm CMOS technology. This conventional design methodology based on EKV3.0 model is clearly suited to the challenges of analog circuits design with reduced channel width. Measures realized with ADS confirmed methodology capability to circuit sizing respecting the specifications of application. The designed ring VCO operates at a central frequency of 433MHz in ISM band with an amplitude of oscillation equal to 500 mV. The integration area was intrinsic (without buffers and without external capacitances). The simulated phase noise is about -108 dBc/Hz at 1MHz, the value of rms jitter is 44.8 ps and the power consumption of the designed VCO is 6.37 mW @ 433 MHz [read more...]

Fig.: Eye diagram for a VCO output @ 433MHz

[paper] 400 fJ Per-Cycle Frequency Reference for IoT

A 400 fJ Per-Cycle Frequency Reference for Internet of Things

Mathieu Coustans, François Krummenacher, Christian Terrier and Maher Kayal

IEL, École Polytechnique Fédérale de Lausanne, Switzerland

Abstract—This work presents an ultra-low power oscillator designed to target different contexts, such as crystal-assisted time keeping, reference oscillator to optimize the always on domain of a microcontroller or wake-up timer. This oscillator enables ultra-low power operation in 180nm CMOS technology with EKV3 compact model; the core oscillator consumes 2.5 nW at room temperature, with a temperature stability of 14 ppm/°C [-40°C - 60°C] and 0.07 %/V supply sensitivity [read more...]

EKV302.00 in Cadence MMSIM 14.10

EKV302.00 is available in Cadence MMSIM 14.10. The new version can be accessed through version control parameter. It includes several enhancements, new flicker noise model and new operating point features.