PXV1220S-4DBN6-T

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Attenuators are electronic components or circuits used to reduce the power of an audio signal. The PXV1220S-4DBN6-T is an example of an attenuator in the form of a rugged dielectric-loaded, solder-in, 2-stage, true digital slide potentiometer. It features a simple rotary dial for adjusting the signal level and a small footprint.

Application Field of PXV1220S-4DBN6-T

The PXV1220S-4DBN6-T is ideal for a variety of applications, such as equalizing audio signals, controlling audio volume, and dynamically shaping audio waveforms. It is designed for wide range audio signals found in conventional and digital audio equipment, including stereo receivers, amplifiers, speaker systems, equalizers, and professional recording and broadcast studios.

Working Principle of PXV1220S-4DBN6-T

The PXV1220S-4DBN6-T works as an attenuator by using a dielectric-loaded slide potentiometer design. The device consists of four terminals: the middle (wiper) terminal, the two outside terminals (ground), and the logarithmic terminal, which follows a logarithmic resistance curve. When operated, a wiper arm slides across the dielectric material between the two outside terminals. As the wiper arm is moved, the corresponding resistance between the middle terminal and either of the two outside terminals will vary linearly, reducing the amount of power that is allowed to pass from one terminal to the other. The attenuator’s resistance range is adjustable and will typically provide an attenuation of up to 40 dB.

It is important to note that the PXV1220S-4DBN6-T is designed to block radio frequency interference (RFI) as an additional feature. This is achieved by selecting the appropriate dielectric material, which results in a narrow pass band and low insertion loss, allowing the attenuator to eliminate noise and other unwanted content.

Attenuation Methods

The PXV1220S-4DBN6-T attenuator supports three methods for attenuating the signal: logarithmic, linearly proportional, and inverse. Logarithmic attenuation is generally used for controlling audio volume, as the signal is attenuated at a rate that is proportional to the power of the signal. Linear attenuation is used to reduce signals by a certain amount at every point along the curve. Finally, inverse attenuation is used to amplify signals while reducing distortion. By adjusting the position of the wiper arm, the PXV1220S-4DBN6-T can be adjusted to any of these methods.

Conclusion

The PXV1220S-4DBN6-T is a two-stage, true digital slide potentiometer used as an attenuator in many audio applications. It is capable of a wide range of attenuation and protection against radio frequency interference, and allows its user to adjust the signal level in a variety of ways. This makes the PXV1220S-4DBN6-T an ideal device for those seeking an efficient and powerful attenuator.

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