In a fullbridge amp with balanced input,does that mean that the amp is ballanced through the whole amp?
And some amps is driven with dual (2x45v) and some single (75v).
I have been searcing for some schemas to understand it but havent found any.does someone have schemas of the difference topologies?
May bee recomend a book or site.
Just trying to understand the difference.
Åke
And some amps is driven with dual (2x45v) and some single (75v).
I have been searcing for some schemas to understand it but havent found any.does someone have schemas of the difference topologies?
May bee recomend a book or site.
Just trying to understand the difference.
Åke
No. A balanced input stage can have a single ended output. A single ended input stage can have a differential output.
An amp with a balanced input and bridge output might well be balanced throughout, but it doesn't follow of necessity.
w
Google 'balun.'
A balun is a BALanced to UNbalanced transformer. This is the simplest way to understand differential and single ended. One side of a balun has a grounded centre-tapped winding the other winding has no centre tap and has one end grounded. At RF, a balanced output might drive a horizontal dipole antenna (completely symmetrical), an unbalanced output might drive a vertical monopole (asymmetrical above a ground plane).
The main significance of balanced (differential) circuits at audio is their immunity to (radio) interference, which affects both inputs equally (hopefully). A well designed balanced circuit is more immune to this 'common mode' noise. Look up CMRR, common mode rejection ratio.
Most everything is single-ended, except for inputs and outputs. A balanced input is good for noise rejection. A balanced output can achieve twice the power output into a given load from a given supply voltage, or is used to transmit over a distance to a balanced input.
w
A balun is a BALanced to UNbalanced transformer. This is the simplest way to understand differential and single ended. One side of a balun has a grounded centre-tapped winding the other winding has no centre tap and has one end grounded. At RF, a balanced output might drive a horizontal dipole antenna (completely symmetrical), an unbalanced output might drive a vertical monopole (asymmetrical above a ground plane).
The main significance of balanced (differential) circuits at audio is their immunity to (radio) interference, which affects both inputs equally (hopefully). A well designed balanced circuit is more immune to this 'common mode' noise. Look up CMRR, common mode rejection ratio.
Most everything is single-ended, except for inputs and outputs. A balanced input is good for noise rejection. A balanced output can achieve twice the power output into a given load from a given supply voltage, or is used to transmit over a distance to a balanced input.
w
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