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Sensitivity And Gain

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57 Threads found on Sensitivity And Gain
The balance between amplification in the stages is quite tricky and depends on what dynamic range and noise figure you want. More gain especially close to the antenna gives lower noise figure but also degrades dynamic range. More gain=less dynamic range= intermodulation and false signals. Less (...)
allison_r, what kinds of sounds are you expecting it to pick up? AGC (ALC) has certain disadvantages you need to be aware of, in particular the time constant of the gain control and it may not work well in some situations. AGC doesn't fix the sensitivity at a constant but correct level, it adjusts it dynamically to try keeping the output (...)
The circuit is too simple and automatic gain control is missing so it will be overloaded by strong local stations. Even my cheap old Sony Walkman FM radio has a manual local-distant switch. Since I live in a huge city with many strong local stations then the switch is always in the "local" position which reduces its sensitivity then it (...)
I had tried to build an audio amplifier using a preamp build out of a transistor and thereafter using lm386 for the audio amplifier. I had received a suitable response using an earphone. But when I use an 8 ohm 0.5 speaker the audio output gets distorted and also the sensitivity reduces. Also I am unable to eliminate the mains noise which (...)
This product is not recommended for new designs. Nordic recommends its drop-in compatible nRF24L01+ or for a System-on-Chip solution the Nordic nRF24LE1 or nRF24LU1+. The ...LU1+ is 0dBm for Tx .... -94dBm RX sensitivity a 250kbps -82dBm RX sensitivity at 2Mbps -85dBm RX sensitivity at 1Mbps Using high gain (...)
In regions where the amplifier open loop gain and feedback determine the output's rejection of supply and ground, the results ought to be similar. The question of "which ground?" might come into play. At higher frequencies where the amp and loop have lower gain, you start to see path and (...)
To add to previous post... the omnidirectional horizontal path and the dead spot on vertical, yields a meagre gain of only 2dBi . 0dB isotropic or 0 dBi is for a theoretical spherical antenna. This "rubber ducky" choice trades sensitivity with directional pattern or "Directivity gain" It does not control the transmit (...)
it is easy to adjust the gain of a photo-transistor for a sensitivity adjustment.
Hello. What is the typical value of frequency sensitivity (kf) in FM and phase sensitivity(kp) in PM? thanks
A REAL radio has many tuned circuits or crystal filters for excellent selectivity, a wide bandwidth and low distortion. It has high gain for good sensitivity and has automatic gain control and good design so that strong local stations do not overload it. A super-regen (...)
Hello, Seeking a cheap transmitter module for data transmission in the band 433/868MHz. My current choice is nRF905 nRF905 and module form
In a reasonable integrator design, you'll have sufficient loop gain and the deviation from ideal integrator behavior will be respectively small and also the parameter sensitivity. There are two explanationa why your design acts apparently different: - the integrator loop gain is too low, which will (...)
As high sensitivity may not be required I think, I would also go for the 2 stage approach. Of course a lower value feed back resistor will introduce more current noise, but you avoid many parasitic problems and you can use a real world feedback capacitor to get a descent response. If you run into 10MOhm or more feedback resistors, and (...)
For example the 4G cellular system LTE use by definition (and mandatory in all test specifications) two antennas connected to 2 independently receivers (for MIMO operation). The Noise Figure, SNR, gain, and sensitivity, of each receive system is analyzed separately. Finlay, when the two receivers are put (...)
Which overall circuit errors are you asking for? There are a least: - gain error (current scaling) - offset error - common mode sensitivity - dynamic error At first sight, resistor mismatch (altready discussed in a same topic thread, why don't you continue it) and OP offset voltage will be dominant error contributions.
The key understanding to very high gain on parabolic reflectors is the sensitivity to error in curvature and focal point error of the the sensor element effectively limit that maximum efficiency of the antenna. You ought to do a sensitivity analysis for surface roughness and shape error (...)
Only an RF System analysis (including radiated TX power and antenna gain) it will tell you the answer. Is related to a lot of system requirements that the receiver should met. As: sensitivity, intermods, blocking, etc, factors that are influenced by the transmitter in a half or full duplex RF system. Generally a duplexer gives about 50dB (...)
Hello Hanaf, What you miss to use the Friis formula, is the gain and sensitivity of the chip. Mostly complete tags are specified with sensitivity in V/m. You can use E = 5.5*sqrt(Gi*Pt) / r, r is not in the sqrt function. Gi = gain of antenna (not in dB's) and r = distance. (...)
Estimating the FM sensitivity is not an easy thing to do unless you have the large signal model of the device. I don't know for sure but it appears the above design of a Colpitts Osc will change freq with the device Miller capacitance on the collector. modulating the current in Q1 affects the gain bandwidth product (GBW) (...)
Fortunately, for LTE, the minimum receive sensitivity is in one of the specifications, and so all you really need to do is figure out the required gain between the antenna connector (Which is specified in dBm, making life easy) and the ADC, probably 1 or 2 Volts peak to peak. Make sure you pay attention to the impedance (...)