Questions tagged [summing]

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13
votes
3answers
4k views

Accidentally downmixed stereo to mono, why does this work?

I have a cheap Chinese Bluetooth audio amplifier like this: It has four screw terminals for the speaker connections, namely L+, L-, R+ and R-. I accidentally connected a single speaker to L+ and R-, ...
8
votes
3answers
19k views

Inverting summing amplifier vs Non-inverting summing amplfier

As known there are inverting and non-inverting summing circuits, such as below: What's their cons and pros?
16
votes
7answers
7k views

Is it possible to combine two 8 bits DACs together to create a 16 bit DAC, one byte of the 16 bit word shall be sent to each of them

For two DACs, one being sent D0-D7 and the other being sent D8-D15, with power supply being 5V, if 5V is added to output of 2nd DAC and then the two DAC outputs are summed, should result in a 16 bit ...
1
vote
3answers
194 views

Is there a limit to the number of inputs that can be summed with an op-amp summing circuit?

I'm interested in the limits you encounter if you try to add many inputs into an op amp summing circuit. I've read that the inverting configuration is more natural for adding many inputs since the ...
0
votes
1answer
317 views

Adding multiple differential signal

As I asked in "Adding multiple analog signal" before, I got that: for adding some signal together, we can only use op-amp, instead of lovely integrated circuit (ough). But the question arise because ...
2
votes
4answers
744 views

Non-inverting Op-Amp Audio Mixer

I am trying to make sense of the difference in non-inverting and inverting op-amp based audio "mixers". The circuits are basically summing op-amp amplifiers. Here is the part which I do not understand....
1
vote
3answers
421 views

How can I add high and low voltage signals to a high voltage DC offset?

It's only a theorethical question, since I'm not really going to build this circuit... I'm just curious, that's all. Anyway, thats my question! I have these signals: 3 kHz, 1V (peak) 20 Hz, ...