Sinusoidal Oscillators: Problems

Abstract

Transmission of wireless signals is based on the idea of existence of a sinusoidal waveform, which in return is modulated in some way that encodes the intended message. In mathematical terms, a sinusoidal function is required for several key mathematical operations that we meet in the following chapters. Physical embodiment of a sinusoidal waveform is known as an oscillator, whose the only role is to deliver clean predefined either voltage or current waveform that is accurately described by a sinusoidal function. What is more, instead of designing a separate oscillator for each desired frequency, in practical realizations we prefer to design tuneable oscillators so that a single circuit delivers a sinusoidal waveform that can take a range of frequencies.