Contents
What is up conversion and down conversion?
An up-down converter and mixer is a device that is intended to convert an analog signal between a lower frequency and a higher frequency. When converting to a higher frequency, the device is said to up-convert, and when it converts a high frequency to a lower one it is said to down-convert.
What are the characteristics of mixer?
Mixer circuits are characterized by their properties such as conversion gain (or loss), and noise figure. Nonlinear electronic components that are used as mixers include diodes, transistors biased near cutoff, and at lower frequencies, analog multipliers.
What is an up mixer?
Upmixing, in its most general sense, is the opposite of downmixing. This means that upmixing is a process that can take some number of audio channels and turn them into a greater number of audio channels, and in practice this process transforms 2-channels into 5.1 channels.
What is frequency down conversion?
In digital signal processing, a digital down-converter (DDC) converts a digitized, band-limited signal to a lower frequency signal at a lower sampling rate in order to simplify the subsequent radio stages. Often the DDC converts from the raw radio frequency or intermediate frequency down to a complex baseband signal.
What is photoluminescence down conversion?
Down-conversion is the process by which one high energy photon, which is inefficiently absorbed by the photovoltaic cell due to thermalisation losses, is converted into two or more lower energy photons.
What’s the difference between a downconverter and a up converter?
RF Downconverter The device which converts high radio frequency signal to low radio frequency signal is known as RF downconverter. Like RF upconverter, RF downconverter will also have either one or two stages of mixing. The lower part of figure-1 depicts C band Rf down converter which converts C band frequency to 70+/-18 MHz signal.
What are the limitations of a dual down conversion receiver?
We can consider three main limitations of the dual-down-conversion receiver shown in Figure 1: The two baseband paths must be highly matched. The IF mixer, LPF, and ADC in the blue path must be matched with the corresponding components in the green path.
What kind of downconverter is used in C band?
The lower part of figure-1 depicts C band Rf down converter which converts C band frequency to 70+/-18 MHz signal. Often RF downconverter is used in combination with RF LNA (Low Noise Amplifier).
What do you need to know about digital down conversion?
Digital down-conversion is a digital-signal-processing technique that is widely used in digital radio receivers. This article will review the basics of a digital down-converter (DDC). We’ll first look at the advantages of using a DDC rather than its analog counterpart. Then, we’ll discuss an example and explore the basic operation of a DDC.