Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [receiver]

A receiver is any electronic device that receives an external signal (e.g., radio, electrical or optical) and converts the information carried by them to a usable internal form.

In communications, a receiver is any electronic device that converts a signal that has been transmitted a long distance (e.g., radio waves, optical pulses or even baseband signals on a cable) and converts the information carried by it to a usable form. This process may include rejection of unwanted signals, demodulation and/or amplification.

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Can a radio transmitter somehow detect the number of receivers in its area?

During conversation, a colleague proposed that over-the-air television and radio broadcasters can determine the number of viewers or listeners based on the "load" on their signal. This seems to me like total bupkis, but he's piqued my curiosity and…
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Can I break a radio tranceiving device by operating it with no antenna connected?

People tell me I shall not use my CB-radio station without an antenna connected or it will result in damage of the device. Is this true and why is this?
arminb
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Why the conversion to intermediate frequency?

While studying about various communication systems (superheterodyne receivers and television receivers, to name a few) I often come across blocks that convert RF signals to intermediate frequency (IF) signals. Why is this conversion needed? Can't…
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How do two UARTS know which baud rate to use?

I am reading about the standard protocol for UART and I think that if the receiving UART does not have any idea on what baud rate the data was transmitted, there would be lots of problems. If the assumed baud rate is lower than the baud rate in…
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Why would a time signal receiving watch have an airplane mode?

I've been looking at radio controlled watches online. I noticed that some radio controlled Casio watches have an 'airplane mode', which disables GPS and terrestrial time signal reception: Now, why would signal reception be restricted? The watch in…
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ultra low power mini wireless transmitter / receiver?

I'm looking for suggestions for a wireless transmitter & receiver combination. I'm basically just trying to bridge several buttons over a wireless signal(s) (i.e. send a 1 bit signal) in as small a package as possible: Very short range (needs to…
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What is the reason behind the wiring of the IF tapped transformers in these AM superheterodyne receivers?

I'm going through R.Quan's book "Build your own transistor radios", and I'm triying to build one of his simple AM superhet receivers. Since it offers many working schematics, the book is very interesting from the point of view of a novice - which I…
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How to end sending data over I2C by Slave or Master?

Let us say a Slave or Master is sending multiple bytes to the receiver on I2C bus and the number of bytes is not defined before hand. So then how will the sender tell the receiver that it has no more data to send? So far what I understand is that…
alt-rose
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Why do we need orthogonality for FSK carriers?

I keep on coming across a requirement for FSK carrier separation, \$1/T\$ for non-coherent detection and \$1/2T\$ for coherent detection, where \$T\$ is bit period. I understand where this comes from in the context of an optimal quadrature receiver,…
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How can a low efficiency antenna be used for receiving but not for transmitting?

For the reciprocity theorem, if an antenna has a low efficiency in transmission, it has the same efficiency when receiving. In literature, it is usually said that one shouldn't use a low-efficiency antenna for transmitting because a lot of power…
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Boost 433 MHz receiver module receiving signal (XY-MK-5V)

I am using some "no-name" (in fact "XY-MK-5V" stands on the board) 433 MHz receiver (and transmitter) on an Arduino project. I can receive the signals sent from my other Arduino very good (it sends with 12 V as mentioned in another question). The…
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Any wireless technology to find the distance between transmitter and receiver

I have a static transmitter and a mobile receiver. Is there any wireless technology to find the distance between the two in real time. Apart from using gps!
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Why does the regenerative circuit not saturate?

In a regenerative receiver, the amplified signal is fed back into the input where it is amplified again and again in a loop. Here is another description of it used in old radios: It is basically positive feedback as in a Schmitt trigger. One would…
user16307
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What is the most accurate and cheap way to figure out the distance between two points electronically?

For a project, I have an idea that involves getting a position for a person throughout a house. I am trying to figure out someway of triangulating the person's position, by having a bunch of little receivers sitting around the house. Each person…
geekman
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How does a closed loop antenna work?

There are many videos and explanations about dipole antennas and the theory seems to make sense. But when I see closed loop antennas I am very confused. None of the material I can find about antennas goes into depth about closed loop antennas. Do…
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