2025年1月10日 · 压控振荡器(以下简称VCO)已经成为当今无线收发器系统中不可缺少的模块,它是锁相环中最重要的block,他的噪声性能直接决定了PLL输出相位噪声的噪声性能.有关PLL整体的分析和设计,我们将在后期重点讨论.这里先重点讨论一下VCO的理论,设计以及对于广大初学者最为 ...

A voltage-controlled oscillator (VCO) is an electronic oscillator whose oscillation frequency is controlled by a voltage input. The applied input voltage determines the instantaneous oscillation frequency. Consequently, a VCO can be used for frequency modulation (FM) or phase modulation (PM) by applying a modulating signal to the

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.

One of the main nonlinear VCO elements, particularly in wideband VCOs, is the varactor diode. The potentially large voltage swing across the varactor(s) leads to departures in the frequency tuning curve from nominal and up-conversion of low-frequency noise components that contribute to VCO phase noise sidebands.

A voltage controlled oscillator or as more commonly known, a vco, is an oscillator where the principal variable or tuning element is a varactor diode. The voltage controlled oscillator is tuned across its band by a "clean" dc voltage applied to the varactor diode to vary the net capacitance applied to the tuned circuit.

2012年2月24日 · A voltage controlled oscillator (VCO) is defined as an oscillator whose output frequency is controlled by an input voltage. It can produce a wide range of frequencies, from a few Hertz to hundreds of Giga Hertz, based on the input DC voltage.

2024年3月22日 · Harmonic or linear voltage controlled oscillator produces the sinusoidal output waveform. Crystal and LC oscillators are the examples of this type of VCO. In this VCO, voltage across the diode varies the varactor diode’s capacitance.

2025年2月6日 · A voltage-controlled oscillator (VCO) is an electronic oscillator whose output frequency is determined by an input voltage. Frequency is the rate at which the phase changes. A voltage-controlled oscillator enables adjustments to this rate of phase change.

2021年2月20日 · 在 vco 处于控制环路中的应用中，如 pll，调谐灵敏度是 vco 元件的增益，可能会影响控制环路的动态性能和稳定性。 VCO 的输出功率规定了向指定阻抗负载输送的功率，对于 RF VCO 来说通常是 50 欧姆 (Ω)。

In a VCO the variable capacitor is implemented using a varactor diode. The Clapp circuit has the advantage of better constancy of feedback because the ratio of C 1 to C 2 does not vary over the tuning range.