I don't quite understand your question. Are you referring to a lightning arrestor - that you mount in series with your coax as it enters the building from the antenna? Lightning arrestors ground the instantaneous voltages that may occur if lightning hits the antennal
PSS is sort-of a harmonic balance simulator. It is for large signal.
If you want to simulate the noise figure of the LNA with the presence of an out-of-band jammer then your PSS beat frequency would be the freq of the jammer. Then run pnoise and integrate the noise across your signal...
Get "RF Design Guide - Systems, Circuits and Equations" by Peter Vizmuller. Alot of very valuable practical stuff in there. Will definitely get you going.
Also look at "RF Circuit Design" by Chris Bowick. This also a good practical book that will introduce you to circuit impedance matching...
The amount of current the regulator will deliver (power it will source / dissipate) depends on its temperature. I am not familiar with the LM723 but I have found with the LM317 (rated for 1A) that when it sources around 200mA it gets pretty hot and then the 12V out will slow drop. The thermal...
I believe biff44 has the answer to your question regarding larger than 10dB gap between P1dB and IP3. When you study PA's you should cover one section on either signal pre-distortion for linearization or cover a topic on feed back distortion.
We all know that adding feedback (or...
I found this URL that contains a document that details the above derivation of IIP3 -vs- P1dB as I described. You will find in this document the 9.6dB rule of thumb on pp8.
http://www.designers-guide.com/Analysis/intercept-point.pdf
So actually, from my last post, it's not just Mixer isolation you have to worry about ... but it's the Mixer iso. plus the reverse isolation of the LNA. In situations where the desired input signal to the LNA is high power the lna is most likely in a low gain mode where it may even be switched...
If you're designing a direct down converter then LO-RF Isolation is very important. If you have 20dB LO-RF isolation and your LO is at 0dBm then that means you are radiating -20dBm LO power out your antenna. The direct down conversion means the LO frequency is at the center of the desired...
The IP3 (referred to input or output) is just a figure of merit for the linearity of the amplifier. Amplifiers need to be linear so they can pass the undesired large adjacent signals (the jammers) while still amplifying the small desired signal (the channel of interest). The higher the IP3...
The Answer:
If you measure IIP3 with 2 tones and then measure Input P1dB with 1 tone you will find that IIP3 is 9.63 dB higher than P1dB. This also goes for OIP3 and output P1dB.
You can do the analysis if you like... it's a couple of pages though. Apply Vin(t)=A.Cos(w1.t) to a non-linear...
Hi All,
I've been searching the web for a Bosch p/n 13913 O2 sensor data sheet or technical description. I'd like to find something that indicates the heater wattage. If there was even more info like transient time (cross over transient time) at a specified RPM that that would also be nice...
The PIC/microcontroller I programmed one time (few years back) didn't have an ADC on it. You may have to use an A2D converter and input the value on the GPIB/data bus.
To fuel this question (which I find interesting) a friend of mine works at Ford dealership. He told me that vechicles parked in the showroom tend to have their batteries go dead... and they have to be frequently charged. I recall seeing vechicles at car dealerships in the showroom with...
