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Single supply preamp and active crossover

by Tesladude
Tags: active, crossover, preamp, single, supply
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Tesladude
#1
Jul4-14, 05:32 PM
P: 135
Hi I am making a preamp and active crossover using the lm833n dual op-amp.
I have already done a project similar to this one and both the preamp circuit and crossover circuit worked beutifuly,
although that project used a split supply and for my car audio I need a single supply.

I have already tried a single supply preamp circuit useing just the basic single supply opp amp circuit which consists of the voltage divider with a capacitor accross the grounded resistor, just like the single supply circuits you can find on the tda2040 or tda2050 datasheets.
It worked fine.

I am using the high pass crossover circuit design from the datasheet.
But I am not 100% sure on how the crossover single supply circuit ia sopposed to look.

I figure it is essencially the same as the single supply op amp circuit with the imput impedence resistor connected strait to the center of the voltage divider and with a capacitor on the output.

is it the same?
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Greg Bernhardt
#2
Jul9-14, 08:32 PM
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I'm sorry you are not generating any responses at the moment. Is there any additional information you can share with us? Any new findings?
thankz
#3
Jul10-14, 09:01 AM
P: 60
http://sound.westhost.com/project123.htm

that should be something like what your looking for, change the RC values to match your frequency.

jim hardy
#4
Jul10-14, 09:32 PM
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Single supply preamp and active crossover

I figure it is essencially the same as the single supply op amp circuit with the imput impedence resistor connected strait to the center of the voltage divider and with a capacitor on the output.
i think you have the right idea, but your description is so vague i'm afraid to say much.
it is not clear to me which of the active crossover circuits you want to use - the TDA2040 shows bridged woofer and single tweeter. For single amplifier on single supply you need to feed the speaker through a large capacitor.

Maybe you'd post a link to the circuit you want to adapt for single supply ?


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