This paper and its companion address the problem of the approximation/identification of nonlinear dynamical systems depending on parameters, with a view to their circuit implementation. The proposed method is based on a piecewise-linear approximation technique. In particular, this paper describes a black-box identification method based on state space reconstruction and PWL approximation, and ap...

This paper presents a 25-MHz fully-integrated digitally controlled crystal oscillator (DCXO) with automatic amplitude control (AAC). The DCXO is based on Colpitts topology for one-pin solution. The AAC circuit is introduced to optimize the phase noise performance. The automatic frequency control is realized by a 10-bit thermometer-code segmental tapered MOS capacitor array, ensuring a 35 ppm tu...

A differential Colpitts oscillator using AlN MEMS CMR designed in 0.13 um CMOS is presented in this work. The oscillator operates at 1.16 GHz, with a total power consumption of 4.2 mW at 1 V supply. It achieves a phase noise of -143.6 dBc/Hz, 173.3 dBc/Hz at 100 kHz and 1 MHz offset frequency respectively with a figure of merit (FOM) of 228.3 dB. Current-based temperature compensation was emplo...

Tool kit is one of learning media that have important role in engineering education, the author has been finished in developing tool kit with oscillator “LC circuit” topic. This oscillator can generate a sinusoidal wave with constant frequency and amplitude. With this tool kit wish the student can develop their skill and applicated in electrical, electronic, communication circuits and systems a...

This thesis presents a backgate coupled QVCO with current reused structure, and complementary cross-coupled differential Colpitts VCO and QVCO. The formally proposed QVCO not only dissipates significantly lower power but also improves 1/ƒ close-in phase noise, compared to the conventional QVCO. For verification of the suggested idea, the proposed QVCO designed for 2 GHz operation based on a 0.1...

Differential equations are useful mathematical tools for solving complex problems. include ordinary and partial differential equations. Nonlinear can express the nonlinear relationship between dependent independent variables. The second-order neutral studied in this paper a class of quadratic differentiable that delay terms. According to t-value interval equation function, basis is needed selec...