Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [summing]

72 questions
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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 DAC made up of two 8 bit DACs. The only problem is…
quantum231
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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-, and was surprised to find that I could hear both…
Bas
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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?
diverger
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How do solar inverter systems easily add AC power sources together?

I understand DC power more than AC power. I know that given multiple DC power generators, easiest way to sum them is by connecting them in series. In paralel you'd need every generator circuit to protect itself from reverse current coming from other…
Evan
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Single-supply non-inverting op-amp for summing DC voltages at unity gain

Is it possible to use this single supply, non-inverting, summing op-amp configuration to sum multiple arbitrary DC voltages at unity gain? I've used the inverting summing op-amp config on bipolar power supplies to sum AC and DC input voltages…
robobozo
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Floating point addition. Are guard, round and sticky bit always necessaryl? analysis of a special case

I've a particular case of floating point addition. As you know for given floating point numbers \$x,y\$ one of the steps of the addition involves the fixed point sum: $$ s = 1.m_x + (-1)^{s_x \oplus s_y} 2^{-\delta}1.m_y, $$ I'm assuming $ |x| > |y|…
user8469759
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DC voltage summing type circuit

I hope someone can help me. I'm not an electrical engineer by occupation. I have a need for a circuit that can do the following: Provide a steady 8 V DC output at rest. Add to that output, the voltage seen on a potentiometer wiper (0 to 7.8 V). In…
Darren
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Don't individual signal sources affect each other when using a summing amplifier?

I am studying the book Electric Circuits by Nilsson & Riedel. There I learned about "summing amplifiers" and how to derive equations by applying KCL at inverting input of the op amp. I see that solving equations result in this "voltage adding"…
alpersunter
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Party-line / Full-duplex intercom - mixing audio signals

Party-line or full-duplex intercoms allow for the simultaneous transmission and reception of audio from all connected stations, i.e. effectively there is an audio 'bus' and each station takes a feed from it and routes this to its headset, and also…
John
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Non-inverting op-amp audio mixer

I am trying to make sense of the difference between 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 (Figure from simulations below). I…
Jüri Bogatkin
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Antenna sector power ratio (total power)

This is maybe a very basic question, which is driving me insane, because I can't remember the theory and neither I can seem to find any source about the topic. I have an antenna, whose SPR (sector power ratio) is defined as the ratio between the…
Noldor130884
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Summing Amplifier Supply Voltage

Consider the case that I have a standard inverting summing amplifier with two inputs: 0.5V DC and 1V DC. Therefore, the output of the amplifier should be -1.5V related to GND. However, If I connect the power supply pins of the amplifier to 5V and…
Aurora7979
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Design methodology for non-inverting summing op-amp

I'm trying to design an op-amp circuit to sum up four voltages by using a non-inverting summing configuration. You can see it in the circuit below, though for illustration's sake, the resistor values are just 100 Ω. I'm having some issues with…
BestQualityVacuum
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Is there a simple fix for summing 2 AC signals?

I have seen many mixer schematics. They are pretty much always the same - a stack of resistors. Even some DJ mixers using the SSM2164 simply joined outputs followed by an opamp. The same thing always happens - the amplitude gets bigger after…
NaturalDemon
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Multiple LM35 temperature sensors with summing amplifier?

I have two big heatsinks with four power MOSFETs on each of them, I want to control the temperature of each heatsinks so that doesn't exceed 80℃ using two LM35 temperature sensors: simulate this circuit – Schematic created using CircuitLab There's…
ElectronSurf
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