Need your help please for a phase correlator schematic

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sylxx

Member
Joined
Jan 21, 2012
Messages
6
Hi everybody,
well I did the Franck's phase correlator (from the remix mag) actually it's work well :).
But I need your help for understanding exactelly some things in the schematic. My questions are:
-could explain me why we must put a 47microfarad capasitor between the ground and the +V ?
-what is the goal of the 2 diodes 1N4148 for the last red led on pin 10 and 11 of the integrator?
-what is the goal exactelly of the pin6 on the lm3914?
-what is the goal of the two 100k resistors (at the begining of the circuit) 
between the 2 capacitors 100  nanofarad and the ground?
thanks you very much for your answer and your helps.
syl
 

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