Hi Folk!
I started to design a small "consumer level" analog board for the Behringer DEQ2496. I need some advice to go further on this project.
The base idea is to build a small pcb to be connected directly on the HE10 connector on the DEQ2496 DSP board. A second HE10 connector permit to connect the cable going to the original input/output board. Most of the original signals pass true the pcb except the input and output analog signals for main left and right.
[IMGDEAD]http://www.awdiy.com/uploads/images/DEQ-Analog/carte_analog.jpg[/IMGDEAD]
I plan to use DRV134 and INA134 chips from Texas or one of their equivalent from THAT.
Beta schematics
My questions are the following:
- I'm loose with signal level and not sure what is the right chip to use for input and output (0dB, +3dB or 6dB version). Note that on the DEQ DSP board, the ADC connections are not direct and this circuit can not be removed. I inserted the circuit in my schematic.
- Do I really need to have a LFE circuit at AK4393 DAC output? I've read in the datasheet that the AK4393 already have an internal LFE circuit.
- Are the coupling capacitors well placed in my current beta design?
One important point: I want to stay with a minimum solution with the minimum possible quantity of components.
If you want to help, thank a lot.
Stef...
I started to design a small "consumer level" analog board for the Behringer DEQ2496. I need some advice to go further on this project.
The base idea is to build a small pcb to be connected directly on the HE10 connector on the DEQ2496 DSP board. A second HE10 connector permit to connect the cable going to the original input/output board. Most of the original signals pass true the pcb except the input and output analog signals for main left and right.
[IMGDEAD]http://www.awdiy.com/uploads/images/DEQ-Analog/carte_analog.jpg[/IMGDEAD]
I plan to use DRV134 and INA134 chips from Texas or one of their equivalent from THAT.
Beta schematics
My questions are the following:
- I'm loose with signal level and not sure what is the right chip to use for input and output (0dB, +3dB or 6dB version). Note that on the DEQ DSP board, the ADC connections are not direct and this circuit can not be removed. I inserted the circuit in my schematic.
- Do I really need to have a LFE circuit at AK4393 DAC output? I've read in the datasheet that the AK4393 already have an internal LFE circuit.
- Are the coupling capacitors well placed in my current beta design?
One important point: I want to stay with a minimum solution with the minimum possible quantity of components.
If you want to help, thank a lot.
Stef...