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Old 22nd January 2013, 12:41 PM   #1
black is offline black  Romania
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Default bridge amplifier

is correct only bridge linking one rezistor ? without phase shifter
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Old 22nd January 2013, 12:48 PM   #2
sregor is offline sregor  United States
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Yes - second amp is a unity gain inverting amp. (+ input grounded, - input connected by same size resistor to output and other channel. Very common circuit used in most stereo bridgeable amplifiers, as only need one resistor and some switches to convert to bridge circuit. http://sound.westhost.com/project20.htm
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Old 22nd January 2013, 02:09 PM   #3
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I hope not to burn anything in amplifier
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Old 22nd January 2013, 05:33 PM   #4
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No problem, straight forward this sollution.
Look at the differential stage as a two input stage.
Inverted and non inverted. Probably easier to see how it all works then.
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Old 25th January 2013, 10:12 AM   #5
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Does anyone have a step-up scheme for a class H amplifier integrated circuit without transistor only regards
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Old 25th January 2013, 11:55 AM   #6
DUG is offline DUG  Canada
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Quote:
Originally Posted by black View Post
is correct only bridge linking one rezistor ? without phase shifter
Put a capacitor in series with R17 or any DC offset will also be amplified.

That is what I would do.

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Old 25th January 2013, 12:37 PM   #7
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the capacitor value and how to put the draw please put sal
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Old 25th January 2013, 11:12 PM   #8
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Instead of just 22K add caps as shown.

Keep the 22K resistor lead very short at the feedback point end.

Put the caps at the "speaker" end.

Caps should be 35V minimum

This is what I would do.

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