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Voltage Controlled Oscillator with Varactor – Electronic ...
https://freecircuitdiagram.com/3989-voltage-controlled-oscillator-with-varactor/
This is a Voltage Controlled Oscillator (VCO) circuit. This circuit is based on Hartley oscillator. The frequency depend on the value of C1 and L1. The oscillation-frequency will change as the change of the capacitance in the varactor BB132 by The Vtuning voltage. The maximum frequency that can be changed is determined by th value of C2.
Varactor Diode - Varicap Diode » Electronics Notes
https://www.electronics-notes.com/articles/electronic_components/diode/varactor-varicap-diode.php
Varactor or varicap diodes are used mainly in radio frequency or RF circuits to provide voltage controlled variable capacitance. These electronic componenta can be used in a whole variety of ways where a capacitance level needs to be controlled by a voltage. Not only can varactor diodes be used for analogue control of a voltage, such as in a phase locked loop, but it can also be …
Varactor Diode Circuits: Varicap Circuits » Electronics Notes
https://www.electronics-notes.com/articles/electronic_components/diode/varactor-varicap-diode-circuits-design.php
The varactor diode requires the reverse bias to be applied across the diode in a way that does not affect the operation of the tuned circuit of which it is part. Care must be taken to isolate the bias voltage from the tuning circuit so that the RF performance is not impaired. The typical voltage controlled oscillator circuit shown below shows the way in which the varactor diode is often …
A Varactor-tuned Oscillator with Linear Tuning ...
https://www.microwavejournal.com/articles/3390-a-varactor-tuned-oscillator-with-linear-tuning-characteristics
A Varactor-tuned Oscillator with Linear Tuning Characteristic. Munkyo Seo, Joo-Yeol Lee and Kyung-Kuk Lee. LG Electronics Inc. Seoul, Korea. Sangwook Nam. Seoul National University. Seoul, Korea. In certain areas of microwave applications such as FMCW radars, FM modulators and phase-locked loop (PLL) circuits, the system performance is enhanced when …
Varactor Tuning Circuit- Explained
http://www.learningaboutelectronics.com/Articles/Varactor-tuning-circuit.php
The varactor is used in this oscillator circuit to vary the frequency of the waveforms produced. This oscillator circuit produces waveforms of different frequencies. When the voltage is increased, the waveforms vibrate much faster. When the voltage is decreased, the waveforms decrease in vibrations.
Varactor Diodes Control Crystal Oscillator Circuits ...
https://www.electronicdesign.com/technologies/analog/article/21769620/varactor-diodes-control-crystal-oscillator-circuits
Designed to control the frequency of crystal oscillator circuits, the 3022 series of high-ratio, hyperabrupt varactor tuning diodes is designed to deliver a dc bias control voltage from …
Oscillator Circuits | Practical Analog Semiconductor ...
https://www.allaboutcircuits.com/textbook/semiconductors/chpt-9/oscillator-circuits/
The varicap multiplier is primarily used to generate microwave signals which cannot be directly produced by oscillators. The lumped circuit representation in the figure above is actually stripline or waveguide sections. Frequencies up to hundreds of GHz may be produced by varactor multipliers. RELATED WORKSHEET: Oscillator Circuits Worksheet
Lesson On Varactor Diodes - QSL.net
https://www.qsl.net/ko6bb/varactor.html
The purpose of this page is to provide the "Newbie" to Homebrewing a little insight into the Varactor Diode, also called a "Varicap".First a little background information. All RF tuned circuits, whether it is an oscillator, an RF amplifier, IF amplifier (just another form of RF amplifier at a fixed frequency) have three elements.
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