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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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What is an example of driver and receiver chips for a PCB?

I am watching some tutorials on signal integrity and the instructor keeps referring to a driver and a receiver. I am a little confused what exactly this would be when designing a PCB is the driver ...
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0answers
34 views

craftsman garage doors sensor not working good [on hold]

My craftsman garage door sensor receiver not works time by time, may because of the winter cold? I opened the receiver's box and plugged into the connector, the green led is on, disappear after few ...
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53 views

Amplifier for 22Hz transmitter [closed]

Can anyone help me find an amplifier that can amplify 22Hz signal which is to be transmitted to a distance of 25m through a copper wounded antenna...I have tried with a voltage (sine wave) of 9V ...
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2answers
52 views

IR receiver giving constant current

simulate this circuit – Schematic created using CircuitLab This is a circuit I made with an 1838D IR receiver in order to test if a tv remote is working, but as soon as I press the button, the ...
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1answer
108 views

UART receiver VHDL

VHDL FPGA UART receiver which receives 10 bits via Bluetooth interface. With 8 7-segment displays. Now my problem is the following In the requirements it is stated that I have to write the solution ...
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2answers
170 views

Explain this circuit

I know this circuit is an oscillator circuit and it senses another signal of same frequency, but I don't understand the calculation behind it, and the reason for emitter inductor, 3.9k collector ...
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32 views

How do I design a transceiver by combining a transmitter and a receiver?

My current project includes building a transceiver , which uses 144-147 MHz frequency, I/P power 10W and uses FM modulation. I was thinking to build an individual transmitter and receiver and ...
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1answer
76 views

Microwave - Standard Intermediate Frequency?

VHF/UHF receivers use one of a few standard intermediate frequencies. Is there a similar set of standard intermediate frequencies for microwave (around 3GHz) receivers? As I understand it, the choice ...
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48 views

Can this transitter on 319.5 MHz signal this receiver on 315 MHz?

In my pile of electronics pieces I have a wireless transmitter with this fcc id that supposedly transmits on 319.5 MHz. In the same pile of stuff I have a receiver with this fcc id that supposedly ...
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1answer
17 views

Friis transmission equation (log scale calculation)

I am trying to understand the Friis transmission equation. My scenario: I consider transmit antennas (\$T_x\$) and receive antennas (\$R_x\$) at a distance R [km]. f [GHz], \$G_{T_x}\$ and \$G_{R_x}\$...
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1answer
47 views

How can I make a voice transmitter receiver? [closed]

How can make a system which have two circuit. And one is place at ground floor and another is in roof. We send voice (like call) one from other by pushing a switch and vice versa. It may be wired ...
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3answers
78 views

Why does the voltage induced in the receiver coil of this WPT circuit decrease when a load is added (in parallel)?

The following is a circuit that wirelessly transfers power via inductive coupling. The circuit is supposed to power a 12 V 0.15 A DC fan and a typical smartphone, which requires 5 V DC across it. The ...
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1answer
38 views

Receiver Antenna Gain

How is gain defined for a receiver antenna? If we look at a radiating antenna, there is a Pin, and the gain in a particular direction would be the radiation intensity Ur, divided by the radiation ...
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1answer
57 views

Creating a wireless transmitter/receiver for off-the-shelf siren

Since I oddly enough haven't been able to find a suitable off-the-shelf product that's reasonable priced (less than 50-60 EUR/USD) and somewhat good looking with Google, I'm about to try a small ...
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1answer
115 views

What does a TV receiver circuit look like? [closed]

I found a few circuits for TV transmitters, but no receivers. I've looked at other simpler RF transmitters and receiver, but it's not obvious to me how to reverse the circuit that I have. I want ...
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1answer
38 views

Locating mobiles/UE by base stations in a cellular system [closed]

After understanding a bit about how actual cellular systems function, I realized that identifying the mobile/UE location is key in assigning the UE to correct base station and thus to guarantee a ...
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0answers
59 views

LoRa RX-Single Mode Inconsistent RX-Timeout Interrupts

I'm trying to implement LoRa communications using an SX1276 module (DRF1276G) and an ATmega328P on a custom PCB. I've got it mostly working but I'm having a strange issue with the timeout interrupt. I'...
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2answers
40 views

Pulse Train Sampling Rate

Assume I have a pulse train with frequency of F Hertz. A normal square wave has all odd harmonics. From Nyquist, if I want to "Reconstruct" the waveform, sampling frequency Fs should be at least 2*(...
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1answer
53 views

Two different widths / sizes of banana plugs on home audio receivers?

I am replacing an Onkyo TX-SR606 with an Onkyo TX-NR575. On the TX-SR606 unit, I used these "dual" banana plugs (see photo), a single unit with both positive and negative connections on it. ...
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1answer
41 views

Quadcopter RX TX questions [closed]

I'm working on a quadcopter and have some questions about the receiver and transmitter. I'm going to be milling the boards myself and wanted to know what would be a good carrier frequency to use. I ...
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1answer
36 views

Does the Si4731 / Si47xx provide the necessary info to fetch left/right demodulated audio levels?

I'm working on a project which uses an Si4731 broadcast radio receiver IC (Si47xx family) and which calls for left & right demodulated audio level meters based on a source FM broadcast signal. I ...
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2answers
97 views

RF range at 169 Mhz

I'm planning a sensor network for agriculture (that apparently doesn't exist yet in this form) and I'd like to understand the possibilities of the radio link. A good number of in-the-field soil ...
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3answers
77 views

Ambiguous symbol [duplicate]

Does anybody know what this symbol presents?
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1answer
83 views

EHF RF Transmitter and Receiver

We are working on a blood glucose meter that will measure BG readings through radio waves with a frequency between 60-70 GHz. That range is necessary to allow penetration through the tissue and we ...
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1answer
94 views

Temperature sensing bee hive

I am a honey bee researcher and I want to build a temperature sensing system to monitor the temperature changes in the three dimensional space within the hive body using 5 sensors on each hive frame (...
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1answer
154 views

Effective area or effective aperture of antenna

The effective area simply represents how much power is captured from the plane wave and delivered by the antenna. The explanation begins oft with assumption that antennas have the same polarization. ...
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40 views

Why do we need an (adaptive) equalizer when we have a matched filter at the receiver?

When both can perform the same task of reducing the effects of ISI, why use both and not just one at the receiver end?
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3answers
628 views

Low power amplifier for 433MHz wake up receiver

I’m designing a low power wakeup receiver (WuRx) circuit that will be used to wake up an Arduino and its 433 MHz transceiver, both of which pull way too much current (tens of milliamps) to keep ...
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1answer
115 views

How do I design a DC-block cap without interfering with my filter?

Background I'm considering the design of an AM receiver for three fixed channels - 3.33MHz, 7.85 MHz, and 14.67 MHz. The antenna I'm considering is a manually-wound loop antenna with a design-able ...
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3answers
220 views

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 ...
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3answers
109 views

How to find coupling and decoupling capacitor values?

I am trying to learn receiver design, one thing I noticed is the use of coupling capacitors and decoupling capacitors and incuctors. There were set of standard values such as 100 pF, 1000 pF or 0.1 uF ...
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0answers
54 views

Frequency selective preamplifier at 10-20 kHz

I'm looking for a way to amplify microvolt AC signals generated in an induction coil. I want to use 5 V single supply rail-to-rail opamps to amplify the signal at least 100 times in the range of ...
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1answer
64 views

Multi-fixed-station AM receiver

I'm in the pencil-and-paper stage of building a radio receiver that has the following characteristics: AM shortwave/HF three fixed frequencies - 3.33, 7.85 and 14.67 MHz single upper sideband with ...
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103 views

AS3932 LF Wakeup Receiver's wake pin never goes HIGH

I've been working on getting the AS3932 3D Low Frequency Wakeup Receiver to work i.e. making the wake pin go High when a 125kHz OOK signal is interfaced with the channel one pin of the input antenna (...
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4answers
1k views

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 ...
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1answer
211 views

What is mean by channel inversion in wireless communication

Regarding the title of the question, to my understanding, Channel Inversion means that "The transmitter adapts its power to maintain constant SIR at the receiver." It is a technique used for ...
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120 views

QI COMM-Signal Simulation ltSpice

For a school project (Wireless Charging), I have to filter out and display the communication signal (2KHz) between transmitter and receiver from the Power Signal (100KHz). For this I have set up the ...
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2answers
68 views

msp430-uart-receiving big data [closed]

I want to take data from sensor with UART. But I know the coming data from uart like; decimal = 126 0 10 131 0 0 27 0 1 2 0 - - 159 hexadecimal = 7E 00 0A 83 00 00 24 00 01 02 00 01 7A DA Firstly,...
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1answer
85 views

How to match two clock signal's phases which are physically apart in two locations?

Suppose, I have one Tx and one Rx physically separated by the long distance with clock signals CLK1 and CLK2 as shown in fig. (say both of 50MHz). I wish to align them in phases. By that I mean, ...
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0answers
91 views

LNA using Common Emitter with feedback collector

I am trying to design an LNA with input impedance of 50 Ohms, I am considering the topology illustrated below. I have found an online calculator that computes this however when I try to work out the ...
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0answers
64 views

I'm trying to tune this receiver to 1360 kHz in the AM Band. What value resistor do I need?

I'm using an Si4844-B20 (datasheet here), and I'm trying to have it permanently tuned to 1360 kHz (AM station). Right now, I'm operating off this example schematic: I'm trying to figure out what ...
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1answer
48 views

SA605 input impedance

I am trying to find the associated input impedance to the SA605 mixer RF inputs. I have found several App notes associated with the Chip that discusses the design. On the datasheet they present the ...
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2answers
152 views

FM preselect filter

Hello I am designing an fm receiver and had some questions about the RF front end. To tune into different channels I know I need a tunable oscillator, but does the bandpass filter connected to the ...
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0answers
48 views

Decrease voltage rating for replacement capacitor

I want to replace 2 large capacitors in my Sherwood S9910 receiver. Existing caps are 15,000 uF 65 volt. Would it be okay to replace with 15,000 uF 63 volt? Or better to go with 18,000 uF 80 volt. In ...
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1answer
78 views

RLC receiver - problem dealing with signal

Hello I have just build colpitts oscillator, which gave me perfect 500Hz sinusoidal wave. So far so good. Now I would like to receive this wave in second circuit "receiver" and here problems start. I ...
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1answer
60 views

FM folded dipole Antenna

I am designing my personal FM receiver, and I have a question regarding how to design my Antenna, in terms of choosing the wavelength to determine the size of the antenna. To put it as simple as ...
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2answers
176 views

Could a vintage 9 transistor AM/FM implement a phase-locked loop of some form?

A side discussion around an answer to the question How many stations could one hear with an AM/FM radio in front of the ISS' cupola window? has arisen with regard to the possibility that a change in ...
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1answer
75 views

Purpose of L2,L3 & C6 in the following CW transmitter circuit

I have been trying really hard to understand the purpose of L2, L3 and C6 in this CW transmitter, especially L3 and C6. I have received many conflicting answers such as that L3 is acting as a ...
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0answers
75 views

self-quenched oscillator

I am trying to simulate a circuit which is composed of an oscillator which oscillates and reaches a maximum oscillation amplitude, then there's a peak detector that is following the peak of ...
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1answer
189 views

direct conversion SSB (vs DSB-SC)

While I understand the problems trying to demodulate a DSB-SC signal using a direct conversion scheme, mostly the phasing issues arising from the fact that the sidebands are symettric and in ...