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Usually it is not a problem, but it depends by your configuration, i.e. if your phase comparator topology is charge pump (you charge/discharge a capacitor or leave it substain the imposed voltage) you should use a FET input amplifier, to reduce leakage effects. If you need an...
Re: Ballast Circuit
International Rectifier and ST Microelectronics have some ICs for electronic ballast. Look at their sites and you will find a lot of application circuits and useful informations.
Probably you mean EPM7128S.
Altera CPLDs (and also FPGAs) always start with FF at zero, if you don't use asyncronous preset with a dedicated "reset" net.
It is true that if you have an inverter after the FF you have "1", but the FF is still "zero".
Remember, to avoid problems with spikes or...
self resonance
Look at:
https://www.avx.com/SpiApps/default.asp
here you will find some interesting tools, such as programs that show impedance vs frequency charts of the capacitor you select.
As I know, battery pack use parallel cells to increase the capacity, but you must be carefull.
Li-ion batteries have a very high energy capacity and low series resistance, so if you short 2 batteries together it could be dangerous.
Battery pack use almost identical cells and some protection: a...
Sebi, are you sure your circuit works?
The current-sensor transistor should be a PNP, with the emitter on the left and the base on the right.
In this way when the base goes 0.7V under the emitter, the collector source corrent to the resistors. With a NPN, the current pass from the base to the...
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