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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.

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Noise Figure at the Rx ADC output

I need to measure gain & nf of the Rx at the ADC output. I inject sine wave tone to the Rx input. Then I make a ram dump of the IF ADC output, read it, perform fft and finally get the IF PSD. My ...
testdriver87's user avatar
1 vote
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How to match RF transmitter (EV1527) and receiver (SYN470) together?

I have a transmitter that uses EV1527 encoder IC in 433 MHz. Here I want to make a receiver by SYN470. In this case, I am amateur and I do not know how to match transmitter and receiver together in a ...
Saeed's user avatar
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Second Opinion on Superheterodyne Receiver Design

I've design a superheterodyne receiver for frequencies between 88-108MHz. Below shows the final schematic and I wanted to get a second opinion on it. Specifically, I wanted to know if the general ...
TheButterMineCutter's user avatar
-1 votes
1 answer
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Sending control signal via FM

Is it possible to send different signals to a receiver using FM which then the receiver would be able to distinguish between and do a set act based on the signal? How to? For example, the transmitter ...
adam_Barfi's user avatar
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1 answer
161 views

Wideband Impedance Matching for Inductive Source/Load

I'm designing the frontend of a receiver and I want the output impedance to be 50Ω so that I can get as much power into the mixer. I tried placing a bandpass filter (image filter for 88-108MHz) in ...
TheButterMineCutter's user avatar
2 votes
1 answer
152 views

Incorrect Output of RF Mixer

I've designed a RF mixer (Gilbert Cell) which takes a RF frequency between 88-108MHz and a LO of 77.3-97.3MHz, I want to take the difference between the two so the IF is 10.7MHz. Currently, the output ...
TheButterMineCutter's user avatar
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96 views

Problems with regenerative receiver circuit

Im trying to build a regenerative receiver, that is supposed to receive a ASK/OOK modulated signal. but there are a few problems. Keep in mind this circuit might be horrendous, but it's just a proof ...
Allfadern's user avatar
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2 answers
160 views

How to design an RF frontend for an FM receiver

I'm designing a RF receiver for FM Radio. I simulated the circuit in LTspice and got an output as shown below: This is OK, but I would like the gain to be 24 dB across the range of 88-108 MHz. The ...
TheButterMineCutter's user avatar
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How to check if I destroyed the bluetooth receiver

I have very little experience with electronics but I tried converting my Logitech unifying receiver to USB-C. I followed the steps I found online and got a functioning result. I based my wiring on the ...
Tee Mizzle's user avatar
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1 answer
100 views

4 MHz RF-receiver not working

I have been trying to make a 4 MHz receiver, to receive a ASK/OOK modulated signal but it never really works. I have my suspicions that it's the LC tank that is not tuned correctly, I am quite new to ...
Allfadern's user avatar
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1 answer
66 views

USRP B200 sample rates

What are the possible sample rates for both transmit and receive on the Ettus USRP B200 mini ? This SDR uses the AD9364 chip. Does the radio use integer divisors of the master clock rate? Or does it ...
BigBrownBear00's user avatar
1 vote
1 answer
154 views

Is it possible to sense a temperature using an infrared LED?

Is it possible to make a remote thermometer using a standard IR LED as a transmitter and an IR receiver diode as a receiver? The range is about 5 meters. I know there are chips available for this ...
Michal Podmanický's user avatar
1 vote
1 answer
62 views

Measuring Doppler and Doppler rate at a receiver

I am simulating receiving a digital signal, QAM modulation, raised cosine pulses... from a satellite to a receiver on the ground. I wanted to honestly simulate measuring the Doppler and Doppler rate ...
Tom McGiffen's user avatar
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0 answers
71 views

What can be done to increase the dynamic range of a FM receiver?

If i have to receive a signal from a far away FM station, nearby stations swamp the receiver if they are both nearby physically or nearby in the spectrum. I believe the AGC in my radio is cutting out ...
Jorge Aldo's user avatar
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Battery State Indicator LEDs in Wireless Charging

I am working on a custom wireless charging System. I am using the following ICs Transmitter IC: https://www.analog.com/media/en/technical-documentation/data-sheets/LTC6992-1-6992-2-6992-3-6992-4.pdf ...
Zunuran Nasrullah's user avatar
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1 answer
58 views

Books/Material for RF transmitter/receiver design [closed]

I am doing my thesis for my BSc in EE. Due to a lack of equipped laboratories in my universities, I cannot do a project in microwave-integrated circuits, as I would have preferred. I am therefore ...
fraghotmailcom's user avatar
2 votes
1 answer
156 views

Can two or more RF noise signals (or noise sources) still be added together if they have been attenuated below the thermal noise floor?

Can two or more RF noise signals (or noise sources) be attenuated below the thermal noise floor, and still add together to be higher than TNF? If a noise signal experiences path loss or attenuation ...
M P's user avatar
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1 vote
1 answer
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USB 3.1 Super Speed Signal Directions

This is a question about the signaling direction of the unidirectional USB 3.1 Super Speed Signals known as RX+/RX- and TX+/TX-. Context: Imagine you have a standard USB-C cable, and a phone. On one ...
nehfan's user avatar
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0 answers
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Receiving Timestamps from PPS using uBLOX MAX M8C-0 GPS Receiver

I am having problems with sending and receiving the messages. I am using the SDA and SCL lines. My goal it to try to use the PPS to get under 5 millisecond accuracy for timestamp purposes. Could ...
jmoffett's user avatar
1 vote
0 answers
88 views

Modern approach of creating VHF FSK (FM) recieeiver

I need to make a narrow band FM receiver for the VHF band. More specifically, not even FM, but FSK. The operating frequency range should include from 35 to 40 MHz. Frequency deviation is around 0.5 to ...
Dj Obsidian's user avatar
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2 answers
143 views

How far could I pick up VHF from?

I’m new to electronics but I'm doing my ATPL pilots license soon and am interested in the EM spectrum and in particular, radio waves. I was wondering what factors affect the maximum distance I could ...
Golf32Charlie's user avatar
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1 answer
99 views

What's the purpose of VCC_RF for u-blox ZED-F9T GNSS receiver?

The ZED-F9T, and presumably other u-blox GNSS receivers, can power an active antenna with a VCC_RF pin. The VCC_RF voltage is specified as being essentially the same as the module voltage (VCC) (...
MattHusz's user avatar
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1 answer
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Replace internal antenna with external antenna

I'm trying to figure out whether it's worth trying to replace an internal antenna for an external antenna of a uhf transmitter/receiver to get a stronger signal in order to get more distance from them ...
Sal's user avatar
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1 answer
101 views

WiFi Transmitter/Receiver [closed]

I want to create a small, battery-powered electronic device to detect the presence of AC voltage after a power outage. It would then transmit notifications to that effect. The two components of the ...
ChuckE's user avatar
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0 votes
1 answer
353 views

LNA saturation issues

I'm designing with LNA to receive a BW = 8 MHz signal (channel BW = 25 kHz), see block diagram: There is a case where an in-band channel signal (or blocker) which is strong enough saturates the LNA ...
Pascal R.'s user avatar
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2 answers
421 views

Received power from multiple transmitters

Assuming I have two transmitting systems, feed by identical signals of the same power, \$P_{TX}\$, which are also in-phase. They are both placed at the same distance to the receiver, and therefore has ...
Linkyyy's user avatar
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0 votes
1 answer
98 views

What does this circuit do? How can I repurpose / modify it for my needs?

Can someone explain what this circuit does? It is a 433 MHz RF module receiver that is supposed to work with digital signals. My goal would be to find out if it can be used to receive analog AM ...
Szilu Channel's user avatar
0 votes
1 answer
80 views

Reducing temperature of the Rx coil in a wireless power transfer circuit

I have currently designed a wireless power transfer circuit which is based on the ZVS principle and Royer circuit. The issue I am currently facing is that the receiver coil is warming up a fair bit, ...
EmeraldMonk's user avatar
3 votes
1 answer
170 views

Can the DC offset on a line input trigger power amplifier shutdown?

I am looking at a Kenwood HiFi receiver (KR V5090) from the late 90s that sometimes loses sound on one channel. Granted, it can just be replaced, but I always like to give devices a second chance by ...
E. van Putten's user avatar
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1 answer
74 views

Homodyne receiver bandwidth

I understand that most, if not all, SDRs use direct conversion, since an SDR can receive several channels simultaneously. So how does tuning the VCO work? Let's assume for simplicity that I need to ...
Haze hh's user avatar
0 votes
1 answer
255 views

DC offset cancellation

I am working on THz detector and was going through research papers. In the receiver stage a preamplifier is used in the circuit shown below. Why can't we directly use the amplifier? How does the dummy ...
prashanth's user avatar
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0 votes
0 answers
127 views

How does an integrating receiver work?

I am reading some papers and in one paper, the working of an integrating receiver is mentioned to remove (periodic) interference from the received signal. The paper explains the working as such: The ...
Mart's user avatar
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7 votes
3 answers
584 views

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 ...
user16307's user avatar
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1 answer
112 views

BLE Sleep and Rx Mode

A Generic Tx Node: Cycle time - 5s. Tx Time (wake up, Tx, Sleep back) - 0.1ms -> current consumption 30mA. Actual Sleep Time (some sleep mode)- 4.9ms -> current consumption 20uA. However for a ...
ankit sultania's user avatar
0 votes
1 answer
98 views

How well synced do digital channels in a phased array need to be?

In order for a narrowband phased array to be coherent channel to channel, what is the maximum timing jitter that can be tolerated between channels? I assume there can be a constant timing error ...
Gillespie's user avatar
  • 161
0 votes
1 answer
373 views

Does antenna thermal noise matter if noise power is higher?

I'm working on designing a radio system for CubeSats and I want to make sure that the sensitivity of my receiver is as high as it can be. I'm trying to understand what parameters are going to set the ...
cEEa's user avatar
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0 votes
0 answers
196 views

Can I directly use an oscilloscope's FFT function for EMI measurement?

The latest oscilloscopes with FFT and real-time functions are very useful for EMI debugging with a near-field probe, but why can't we just use them for the far-field EMI scan? EMI receivers are much ...
David W's user avatar
1 vote
3 answers
420 views

Using antenna instead of an AC source on the circuit diagram

Here's an LNA circuit I found on google: Can I replace the AC source with an antenna?
LucasSokol's user avatar
0 votes
1 answer
189 views

Is a LNA necessary in RF receiver circuits?

Is it possible to receive signals properly from the transmitter within a short range without a low noise amplifier in the receiver, or does the LNA provide more than power amplification, like helping ...
LucasSokol's user avatar
0 votes
1 answer
191 views

How is the PASCO microwave receiver realized?

I took a physical lab course where I worked on the microwave PASCO set-up WA-9316. Having a little background on electronics, I wondered how their microwave receiver works and found a more or less ...
simonstar's user avatar
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0 answers
53 views

Receiver antenna design for reading PIT tags implanted in snakes and reptiles

I am talking to a local conservation outfit trying to replace active implantable radio tags with passive PIT tags (I do not know who the manufacturer is). These active tags are really tiny glass ...
user3418620's user avatar
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1 vote
0 answers
93 views

Clarification on I/Q Mixer output

I'm working on RF Receiver, it is required to use I/Q Mixer for IF downconversion. Specification as follows below ...
Dinesh 's user avatar
0 votes
1 answer
118 views

Magnetron as receiver

If a magnetron is heated, but no high voltage applied, and microwave power of matching frequency is externally applied to its "output", would that produce a voltage across the HV terminals? ...
dronus's user avatar
  • 553
5 votes
3 answers
594 views

Which noise sources dominate in a receiver?

For a radio receiver that digitizes over-the-air RF signals (such as an SDR), my assumption (as a DSP guy; pardon my hardware ignorance!) has been that thermal noise dominates total receiver noise, ...
Gillespie's user avatar
  • 161
0 votes
2 answers
257 views

How to determine the radiation pattern of a receiver antenna

I am designing a receiver antenna for a wireless power transfer application. The transmitter is a 2m x 2m horn antenna array that transmits a power signal at a frequency of 35 GHz from 100 meters away ...
mesi's user avatar
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0 votes
1 answer
134 views

Receiver circuit design testing

I am trying to make a receiver circuit that is able to receive an LED input (further down the line receiver input from a laser). Firstly, I am trying to test the photodiode that will be used. I am ...
Martial's user avatar
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-1 votes
2 answers
65 views

What is the recommended Amplifier/Receiver (AVR) for my Surround Sound 5.1 Speakers Configuration?

Here are my speakers & subwoofer configurations, wondering if anyone can help me suggest a minimum AVR configuration I should go with: I am looking at Harman/Kardon or Denon AVRs. Little back ...
Amith Kumar's user avatar
1 vote
1 answer
337 views

VCO generating a lot of electrical noise, picked up by ultrasonic transducer

In my setup, I have a VCO CD4046 Phase Locked Loop IC generating a square wave, and an ultrasonic transducer set that transmits and receives that setup. You can imagine it looking something like this. ...
HFOrangefish's user avatar
0 votes
1 answer
195 views

Offsetting an ultrasonic receiver's signal for an amplifier with a floating ground

I have an ultrasonic receiver that I'm putting through an amplifier. I've created a floating ground for the amplifier (because I want to pretend having a negative voltage supply). However, to achieve ...
HFOrangefish's user avatar
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0 answers
56 views

How would I make a wireless pressure switch for turning on and off a flash light?

I want to make a wireless pressure switch for a flash light mounted on an airsoft gun I have figured out that I would have to use an RF transmitter/receiver like this one: https://www.amazon.com/3-7-...
Jacob Finch's user avatar

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