BB 689 E7903

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Diodes - Variable Capacitance (Varicaps, Varactors) are a type of semiconductor device used in electronic circuits. These devices are typically used in applications that require precise adjustment of tuned circuits, such as radio receivers, voltage-controlled oscillators, and other frequency-dependent circuits. The BB 689 E7903 Varactor Diode is a model of variable capacitance diode that is widely used in such applications.

A variable capacitance diode (also known as a varactor diode, or Varicap diode) is a special type of diode that has an internal capacitance which can be varied. This allows an alternating current (AC) signal to be changed in level as it passes through the diode. The BB 689 E7903 is a type of varactor diode which is designed to provide a wide tuning range and high linearity with minimal non-linear distortion. This makes it ideal for use in many types of frequency select circuits.

The BB 689 E7903 Varactor Diode is a PN junction diode that is fabricated using an alloy of aluminum, indium, and zinc. This alloy is designed to have a large capacitance variation over a wide range of forward bias voltage. As the forward bias voltage is increased, the capacitance increases, and vice versa, allowing the application to precisely control the level of the AC signal passing through it. The specific performance characteristics of the BB 689 E7903 diode are outlined below.

Frequency range: 250kHz to 2GHz
Forward bias capacitance variation: 40 to 60pF
Reverse leakage current: 3mA at 10V
Dynamic Impedance: 40Ω

The BB 689 E7903 Varactor Diode is used in a wide variety of applications. It is used in radio transmitters and receivers to control the frequency of the carrier wave. It is also used in IF and RF Tuned Amplifiers, Voltage Controlled Oscillators (VCOs), and other tuned circuits. It can also be used in voltage-controlled filters and PLL circuits. Additionally, it is widely used in non-RF applications to control the level of an AC signal.

The working principle of the BB 689 E7903 Varactor Diode is based on its internal capacitance. The diode has a junction inside that is made of an alloy of aluminum, indium, and zinc. When the diode is forward biased, this junction creates an electronic barrier that blocks current flow. As the bias voltage is increased, the capacitance of the junction increases, and so does the amount of current that can flow through it. By controlling the bias voltage, the level of the AC signal passing through the diode can be precisely adjusted.

In summary, the BB 689 E7903 Varactor Diode is a type of variable capacitance diode that is used in many types of electronic circuits. Its unique characteristics allow it to be used in applications that require precise frequency or level adjustments. The diode works by controlling the level of the AC signal passing through it by changing its internal capacitance as the bias voltage is adjusted. This makes it ideal for a variety of applications, including radio transmitters and receivers, IF and RF Tuned Amplifiers, Voltage Controlled Oscillators, and other tuned circuits.

The specific data is subject to PDF, and the above content is for reference