Output Swing • Peak differential output voltage swing is given by: • How much is the output CM level?

Abstract—This paper presents a high-swing VCO combining the efficiency of the class-C oscillator with that of the complemen-tary PMOS-NMOS topology. Moreover, removing the traditional tail current source, the VCO exhibits an even larger swing, maximizing the phase noise performance.

2021年1月26日 · VCOs are specifically designed to produce an output signal whose frequency varies according to the amplitude of an input signal over a reasonable range of frequencies. VCOs come in discrete, modular, and monolithic forms, but a discussion of discrete VCOs will provide a basic understanding of how they operate and why certain specifications matter.

An LC tank VCO can be thought of as two 1-port networks connected together. Figure 2.1: LC Tank. One 1-port represents the frequency selective ”tank” where the oscillations occur

High Frequency VCO Design - Cambridge University Press & Assessment

By removing the tail current source of a class-C VCO, a high-swing VCO core has been introduced. The use of a transformer has added an additional degree of freedom so that a bias control circuit can adjust gate bias of the switching pair to a low voltage for the highest tank swing.

2013年10月31日 · This paper presents a high-swing VCO combining the efficiency of the class-C oscillator with that of the complementary PMOS-NMOS topology. Moreover, removing the traditional tail current source, the VCO exhibits an even larger swing, maximizing the …

The odd harmonics (3rd order in particular) of the VCO are not of much concern because such harmonics are not detrimental to multiplication action of the mixer. In fact, presence of odd harmonics often helps to shape the output wave to have sharper transitions when crossing zero, which is desirable in wireline systems.

2022年2月10日 · This letter reports the design and analysis of a swing-enhanced class-D voltage-controlled oscillator (VCO) utilizing a periodically time-varying (PTV) inductor to boost the output swing that effectively improves the phase noise (PN) in …

VCOs are the critical component of RF transceivers and are used to perform signal processing tasks such as frequency selection and signal generation. In digital circuits, oscillators are used to synchronize the operations using a reference clock.