onceinalifetim said:Hello
I am trying to learn something and really hope to get some help..
i know the use of envelope detector.. but when to use product detector?
i know product detector will be more expensive than envelope detector.. please help
onceinalifetim said:hello.
what is the condition to use product detector?
A product detector is a circuit used in radio receivers to convert the high frequency signals received from the antenna into a lower frequency signal that can be amplified and demodulated. It works by multiplying the received signal with a local oscillator signal to produce a new signal at the difference frequency between the two. This new signal is then amplified and filtered to extract the original audio signal.
A product detector should be used when receiving amplitude modulation (AM) signals. This is because AM signals consist of a carrier wave and the modulating audio signal, and the product detector is able to extract the audio signal from the carrier wave.
The main benefit of using a product detector is that it allows for the demodulation of AM signals, which are commonly used in radio broadcasting. Product detectors are also more efficient than other types of demodulators, resulting in better quality audio signals and improved reception of weak signals.
One potential downside of using a product detector is that it requires a local oscillator signal, which can introduce noise into the demodulated audio signal. However, this can be minimized by using high quality components and proper circuit design.
While product detectors are primarily used for AM signals, they can also be used for single sideband (SSB) and continuous wave (CW) signals. However, the local oscillator frequency must be carefully adjusted to match the sideband frequency in order to extract the desired signal.