MikeJ-UK

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Professional engineer with a BSc in Electronic Engineering from the University of Southampton (1981). I have held a variety of design positions in various disciplines, both hardware & software over the years.

	3,806 reputation	bio	website		visits	member for	2 years, 5 months
210 badges		location	Essex, United Kingdom		seen	11 hours ago

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12h	comment	find TH1 in AT89s52 micro controller in serial communication I'm not familiar with the 8952 but looking at some of my old 8752 code, I see that I have set the MSB of PCON with the comment `/* Use timer 1 for baud rate. */` (which may or may not be relevant to your device).
1d	comment	Can we measure reflected power in a transmission line? @HarryWeston - The diode is there (as you said yourself above) as a detector for the meter.
1d	comment	Can we measure reflected power in a transmission line? What about a long spring anchored at one end and plucked? You can physically see the energy pulse (as is evident from the compression) travel to the anchored end and return, and you will feel the returned energy. Similarly if you applied a voltage impulse to one end of a very long lossless open circuit (or short circuit) transmission line, you could disconnect the source, replace it with a 'scope and wait for the reflected pulse to return - and you would detect it. However I agree with your linked article about the common misunderstanding in regard to amplifier loads.
1d	comment	Can we measure reflected power in a transmission line? @HannoBinder - No, it will work with a continuous sinusoidal signal - although I confess I am a little vague on the physics of why the reverse detection diode does not 'see' the forward component.
1d	answered	Can we measure reflected power in a transmission line?
May 7	comment	Syn Generators(Short Circuit Ratio) Apparently, it's the ratio of the field current for rated open-circuit voltage to the field current for rated short-circuit current in a synchronous generator.
Apr 29	comment	STANAG 3350B pcb guidelines STANAG 3350B is a standard for video signals and does not AFAIK address PCB layouts.
Apr 29	answered	Derivation of filter tables
Apr 23	comment	Simple RC circuit with diode question @subz It is the simulator - I just tried this myself and got the same result. It seems you need to edit the capacitor's properties and uncheck "Trapezoidal approximation".
Apr 22	comment	Char array at an int in C18 I think PeterJ beat me to it!
Apr 22	comment	Char array at an int in C18 Is a C union what you're after?
Apr 18	comment	Finding values of LRC circuit when frequency is given Look at your final equation for C. What happened to the '8' from the line above?
Apr 11	comment	Would plugging a 1M resistor into the outlet be bad? I don't like to sound like a patronizing old guy, but I used to do things like that at your age - and I had several nasty shocks as a result. Quite honestly I'm lucky to be alive now. Eventually I became a professional engineer instead of trying to kill myself!
Apr 10	comment	The open loop transfer function of a unity feedback control system is given as \$G(s) = \frac{as+1}{s^2}\$ Look at the last line of the first paragraph, then the second paragraph of that wikipedia article, where it references the loop gain
Apr 10	comment	The open loop transfer function of a unity feedback control system is given as \$G(s) = \frac{as+1}{s^2}\$ You have correctly said that the magnitude of the loop gain is 1 at the frequency of interest, but on the next line you have analyzed the closed-loop gain.
Apr 10	comment	The open loop transfer function of a unity feedback control system is given as \$G(s) = \frac{as+1}{s^2}\$ 1. Why are you analyzing the closed-loop transfer function and 2. Why have you made that strange substitution for ω?
Mar 22	comment	Flow of holes in transistor? @Ali Kahn - Yes, because if a hole moves in one direction, an electron must have moved in the opposite direction.
Mar 22	comment	Degradation of AC signals as inputs of inverter amplifier circuit Your input is sin(1000tπ) and not 2.sin(1000tπ)!
Mar 22	comment	Degradation of AC signals as inputs of inverter amplifier circuit @ConnorWolf - Agreed with R2=10k, but if he reduces it to 1k the output would be ±10V and not clipped.
Mar 22	comment	Degradation of AC signals as inputs of inverter amplifier circuit @ConnorWolf - Looking at the 'scope trace, Sebastians input is only 1V peak (not 2V peak as he says) so with R2=1k his output won't clip. Also, with R2=10k, his gain is 100 not 1000!