Διαφορές Pre-Pro με ολοκληρωμένο AV

[parkos]

Απάντηση: Διαφορές Pre-Pro με ολοκληρωμένο AV

τη διαφορα την κανει το..

ΛΛαρα ε3ελλ γουαος μπουολ.

 

[gstriftos]

Απάντηση: Διαφορές Pre-Pro με ολοκληρωμένο AV

Ότι του φανεί του λωλοστεφανή..


Πάμε άλλη μια φορά:
Αν το κύκλωμα δεν είναι balanced το να χρησιμοποιήσουμε τέτοιου είδους συνδέσεις σε οικιακές συνθήκες είναι θέμα ψυχολογίας.Ο οποίος όμως είναι ο ισχυτότερος παράγοντας σε αυτό το ρημαδοχομπι..

 

[Yiannis_B]

Απάντηση: Διαφορές Pre-Pro με ολοκληρωμένο AV

Differential signalling

Signals are often transmitted over balanced connections using the differential mode, meaning the wires carry signals of opposite polarity to each other (for instance, in an XLR connector, pin 2 carries the signal with normal polarity, and pin 3 carries an inverted version of the same signal).

Despite popular belief, this is not necessary for noise rejection. As long as the impedances are balanced, noise will couple equally into the two wires (and be rejected by a differential amplifier), regardless of the signal that is present on them.[1][2] A simple method of driving a balanced line is to inject the signal into the "hot" wire through a known source impedance, and connect the "cold" wire to ground through an identical impedance. Due to common misconceptions about differential signalling, this is often referred to as a quasi-balanced or impedance-balanced output, though it is, in fact, fully balanced and will reject common-mode interference.

http://en.wikipedia.org/wiki/Balanced_audio

Balanced and differential
Main article: Balanced circuit

Most explanations of balanced lines assume symmetrical (antiphase) signals but this is an unfortunate confusion - signal symmetry and balanced lines are quite independent of each other. Essential in a balanced line is matched impedances in the driver, line and receiver. These conditions ensure that external noise affects each leg of the differential line equally and thus appears as a common mode signal that is removed by the receiver. There are balanced drive circuits that have excellent common-mode impedance matching between "legs" but do not provide symmetrical signals.[6][7] Symmetrical differential signals exist to prevent interference with other circuits - the electromagnetic fields are canceled out by the equal and opposite currents. But they are not necessary for interference rejection from other circuits.

http://en.wikipedia.org/wiki/Balanced_line

Και ένα πολύ ενδιαφέρον άρθρο.

http://www.jensen-transformers.com/an/ingenaes.pdf