All the VCO schematics presented below were practical build using the Infineon SiGe transistor BFP420, and any of them can be re-tuned for different frequency ranges changing varicaps and LC tank values. The VCO must exhibit a low Phase Noise in order to meet the Sensitivity, Adjacent Channel and Blocking requirements.

2021年3月28日 · This blog post covers the construction of a voltage-controlled oscillator (VCO) intended to cover the range of approximately 98 MHz to 118 MHz (you can probably guess what use such an oscillator could have!), although this design could be modified for different ranges from tens of MHz to perhaps 500 MHz.

2021年10月26日 · In this post I have explained how to build 6 useful voltage controlled oscillator circuits, using various op amps and integrated circuits. As the name suggests, a voltage controlled oscillator or a VCO circuit is an oscillator circuit whose output frequency can be controlled or varied through an adjustable control voltage input.

VCO stands for Voltage Controlled Oscillator. VCO is an Oscillator of which frequency can be Controlled by external Voltage stimulus. One of major applications for VCO is a frequency synthesizer. Frequency synthesizer provides sinusoidal/pulse signals at predetermined frequencies that is precisely controllable by digital words.

2013年12月29日 · 压控振荡器，英文全称voltage-controlled oscillator，是各种无线收发系统都具备的重要功能部件，在以下的讨论和介绍中，都以VCO简称。 本文是介绍VCO的难得的经典文章，不敢独享，在这里分享给大家，只不过这篇文章

2021年2月20日 · 使用 VCO 分立式方法，设计者能够极其灵活地满足定制指标。这种方法在自己动手 (DIY) 项目中尤为常见，特别是在业余无线电领域。这类设计旨在用于高频无线电项目，基于经典的振荡器拓扑结构，包括 Hartley 和 Colpitts 电感电容 (LC) 振荡器（图 2）。

2021年8月10日 · Overall this is a relatively simple high-frequency two-decade VCO design that uses 3 x LM393 comparators to generate square and triangular signals with tunable frequency based on the control voltage +Vc.

We assumed an input DC voltage as our sensor and built a voltage-controlled oscillator (VCO) to turn different DC voltages into correspondingly different frequencies, which the microphone input into the smart phone’s audio port reads as different tones.

In this circuit, we will show how we can build a voltage controlled oscillator (VCO) with a 555 timer chip. A voltage controlled oscillator is an oscillator whose frequency is controlled by an input voltage. Basically, the voltage input into the VCO chip controls how many times a digital signal will oscillate in a given time period.

2024年11月27日 · 我研究了一下上面的论文，它是在传统8相位ring vco的基础上加上额外的前馈路径来实现频率的提升，但是楼主你发的电路图和文章里的还不一样，它相当于在两个环路之间通过一些反相器实现8相位，我也对两种电路进行了搭建和仿真，结果相差还挺多的