why all electronic circuits are grounded?(read detrails)?
Monday, May 25th, 2009 at
3:16 pm
i know what is earthing.I want to ask why electronic circuits as wein bridge oscillator and amplifier r always grounded if ground pot. is always zero then all current will go through ground only
for ex. in Wein bridge Oscillator one of the capacitor will be useless to pass current in lead lag circuit
Tagged with: amplifier • capacitor • Electronic Circuits • lead lag • pot • wein bridge oscillator
Filed under: Grounded Electronic Circuits
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There are lots of reasons to ground but you are interested in electronics rather than power so let's focus there. In circuits that require low noise levels it is important to ground both the circuit and the case/shielding to minimize the effect of stray EM radiation.
In working on all semiconductor electronics earth grounding everything (including the technician) is the only way to avoid damaging electrostatic discharge.
In any radio application it is important for equipment ground to be directly earthed.
In less sensitive applications, "grounding" to the power carried ground is adequate. (In the bad old days even "grounding" to the neutral worked.)
In a battery driven application like a cell phone the terminology "ground" simply means common which is usually connected to the negative battery poll.
Grounding is the COMMON point in the circuit.
Grounding offers a return path for the current AND makes a unit save to handle. Floating ground can cause fatal electric shock.
This prevents noise from other stray signals.
the main purpose of electronic circuits grounding is to shield against incoming radiated noise interferrence