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Recently, I've been decapsulating chips and finding inductors printed on them, and I would appreciate some help in understanding their design. I'm used to inductors that look like this:
http://imageshack.us/a/img209/4336/dsc015454.jpg
A circular coil of wire- the most basic geometry. Most of the inductors don't look like this, a more common geometry is this:
http://imageshack.us/a/img811/6240/rectanglenewout999990.jpg
which I think is similar to a coil with multiple (opposed) windings. I don't understand the rationale for all the different shapes- circular, octagonal, square-ish:
http://imageshack.us/a/img341/8560/dsc015456.jpg
http://imageshack.us/a/img841/5575/dsc015452.jpg
Many of the inductors have elaborate 'bases' associated with them:
http://imageshack.us/a/img17/9995/dsc099902.jpg
And there are a few that let the trace width vary, which is very odd:
http://imageshack.us/a/img72/3156/dsc004761.jpg
http://imageshack.us/a/img338/8490/dsc01756u.jpg
Any insight would be very appreciated, thanks in advance.
http://imageshack.us/a/img209/4336/dsc015454.jpg
A circular coil of wire- the most basic geometry. Most of the inductors don't look like this, a more common geometry is this:
http://imageshack.us/a/img811/6240/rectanglenewout999990.jpg
which I think is similar to a coil with multiple (opposed) windings. I don't understand the rationale for all the different shapes- circular, octagonal, square-ish:
http://imageshack.us/a/img341/8560/dsc015456.jpg
http://imageshack.us/a/img841/5575/dsc015452.jpg
Many of the inductors have elaborate 'bases' associated with them:
http://imageshack.us/a/img17/9995/dsc099902.jpg
And there are a few that let the trace width vary, which is very odd:
http://imageshack.us/a/img72/3156/dsc004761.jpg
http://imageshack.us/a/img338/8490/dsc01756u.jpg
Any insight would be very appreciated, thanks in advance.
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