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Questions tagged [virtual-ground]

In electronics, a virtual ground (or virtual earth) is a node of a circuit that is maintained at a steady reference potential, without being connected directly to the reference potential.

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115 views

Use of virtual ground to split ground loops?

So I have a "broadband" signal (DC-5MHz) which I'd like to send over coax cable to two other circuits referenced to the same ground. Simply floating the other two circuits is not an option for ...
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981 views

Why do some audio amplifiers connect the power ground to the signal ground?

Trying to add a MIDI synthesizer & speakers to a keyboard here. Here's the schematic: simulate this circuit – Schematic created using CircuitLab But I was getting annoying crackling and ...
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Would a current feedback op-amp work well as a precision ground reference?

I've been looking into precision ground reference circuits to form ±5V rails from a 10V supply for a project I'm working on, and noticed that current feedback (CFB) op-amps have some desirable ...
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366 views

V+, V- and GND - Getting started with virtual grounds

I've been happily playing around with TTL logic but have recently come across an Analog / Digital converter TSC7106 whilst tearing apart an old thermostat which has demanded V+, GND and ... V- :o I ...
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Driving an XLR input with virtual ground

I am building an audio circuit. I would like it to have XLR as an input (as well as others). It needs at least 12 Volts to operate. To drive my operational amplifiers, I am using a rail splitter with ...