Voltage Controlled Oscillators

Introduction

Voltage controlled oscillators refer to the output frequency and the input control voltage has a corresponding relationship with the oscillator circuit (VCO), frequency is a function of the input signal voltage of the oscillator VCO, the working state of the oscillator or the component parameters of the oscillation loop are controlled by the input control voltage, which can constitute an oscillator.

It is an electronic oscillation circuit design that uses a voltage input to control the oscillation frequency. The frequency or repetition ratio of its oscillation will change with different DC voltages, and this feature can be used to use the modulation signal as the input of the VCO to generate different modulation signals, such as FM modulation, PM modulation, and PWM modulation.

Principle

The voltage control frequency part of the high-frequency voltage controlled oscillators are usually an LC resonant circuit connected by a varactor diode C and an inductor L. By increasing the reverse bias voltage of the varactor diode, the empty area in the diode will increase, and the capacitance will decrease as soon as the distance between the two conductors becomes longer, and the resonant frequency of the LC circuit will be increased. Conversely, when the reverse bias voltage is reduced, the capacitance in the diode becomes larger and the frequency decreases. Low-frequency voltage-controlled oscillators, on the other hand, choose different methods depending on the frequency, such as changing the charging rate of the capacitor to obtain a voltage-controlled current source.

Merit

The types of voltage controlled oscillators are LC voltage controlled oscillators, RC voltage controlled oscillators and crystal voltage controlled oscillators. The technical requirements for voltage-controlled oscillators mainly include: good frequency stability, high control sensitivity, wide frequency modulation range, frequency offset and control voltage linear relationship and suitable for integration. The crystal voltage controlled oscillator has high frequency stability, but the frequency modulation range is narrow; RC voltage controlled oscillators have low frequency stability and wide frequency modulation range, and LC voltage controlled oscillators are in between.

Application

Voltage-controlled oscillators are also widely used in the following aspects:

1. Signal generator.

2. Used in electronic music to create pitch shifting.

3. Phase locked loop.

4. Frequency synthesizers in communication equipment.

Certificate

We implement TQM (Total Quality System) and SOP (Standard Operation Procedure) with ISO 9001:2017 certification, which assures a strong commitment to quality standards and customer satisfaction.

Shipping

We will send the goods to you by DHL, FEDEX, UPS, EMS, AIR, etc. Usually 7-15 working days after receiving your 100% payment. For bulk orders: 15-35 working days after receiving the deposit.

Packaging

To better ensure the safety of your goods, professional, environmentally friendly, convenient, and efficient packaging services will be provided. After receiving the goods, if you have any dissatisfaction or other issues, please contact us ASAP, and we will give you a fast response and reasonable solution.

Hot Tags: voltage controlled oscillators, China voltage controlled oscillators manufacturers, suppliers, factory, ldr light sensor, afr sensor, capacitive transducer, optical proximity sensor, led sensor, tmr sensor