In this paper, we describe an original method for determining the optimal operating point of the active part (transistor) of an LC oscillator leading to the minimum phase noise for given specifications in terms of power consumption, oscillation frequency and for given devices (i.e., transistor and resonator). The key point of the proposed method is based on the use of a proper LC oscillator arc...

................................................................................... pg. 04 Chapter 1 – Introduction ................................................................. pg. 04 Chapter 2 – Background ................................................................. pg. 06 Chapter 3 – Voltage Controlled Oscillator ............................................. pg. 08 LC Oscillator ......

This paper presents design, fabrication and characterization of two differential Colpitts voltage controlled oscillator (VCOs) cross-coupled VCO (CC-VCO) and double cross-coupled VCO (DC-VCO) in InGaP/GaAs HBT technology. Their main parameters like the oscillation frequency, output power and phase noise performance are measured and compared with other recently published studies. In the cores of...

The fact that there exists a core sinusoidal oscillator at the heart of Saito’s double-screw hysteresis chaotic oscillator is demonstrated. By applying Bruton’s transformation to the active linear part of the circuit, which is shown to be a classical LC-R negative resistor sinusoidal oscillator, an inductorless realization based on a frequency-dependent negative resistor (FDNR) is obtained. The...

Demand for higher numbers of communication channels imposes tighter phase noise performance for the local oscillators. Cross-coupled oscillators are widely used due to ease of implementation and differential operation (Figure 17.2.1a) [1,2,3]. Unfortunately, in cross-coupled VCOs the maximum noise generation instant coincides with maximum phase noise sensitivity and hence the cross-coupled VCOs...

Following the ever-improving performance of data converters, the accuracy of the clock that is sampling the data converter, needs to improve at the same pace. The clock accuracy is especially a problem for high-resolution, wide bandwidth converters. The aim of this project is to provide for a next-generation high-performance clock as a library block for the Process & Library Technology (PLT) gr...

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Perhaps the simplest Colpitts oscillator to construct and get running. Because there is no load on the inductor a high "Q" circuit results with a high L/C. Colpitts Oscillator Tutorial and the theory behind the design of the Colpitts Oscillator which uses a LC Oscillator tank circuit to generate sine waves. The Colpitts Oscillator Circuit Characterised By Tapping The Midpoint Of The Capacitive ...

A PLL Design Based on a Standing Wave Resonant Oscillator. (August 2010) Vinay Karkala, B. Tech., Indian Institute of Technology Madras, India Chair of Advisory Committee: Dr. Sunil P. Khatri In this thesis, we present a new continuously variable high frequency standing wave oscillator and demonstrate its use in generating the phase locked clock signal of a digital IC. The ring based standing w...