[SI-LIST] Re: question about voltage dividers
- From: "Haller, Motti" <motti.haller@xxxxxxxxx>
- To: Roy M <roymesi@xxxxxxxxx>
- Date: Wed, 4 Mar 2009 11:12:34 +0200
You probably need to consider parallel loads, leakage and rise/fall time.
Also freq domain and stability if its for operational amplifiers.
Regards,
Motti
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Pramod Parameswaran
Sent: 04 March, 2009 11:03 AM
To: Roy M
Cc: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: question about voltage dividers
I think you might have to give a thought about the area required to realize
resistors.
Thanks,
Pramod
On Wed, Mar 4, 2009 at 2:06 PM, Roy M <roymesi@xxxxxxxxx> wrote:
> HI,
> I have a general, rather basic, question concerning voltage dividers.
> We all know that when it comes to voltage dividers, the *ratio* between the
> resistors is what matters to the Vout value, and not the resistors'
> *value*itself.
> But if I know for instance, that the ratio is 1:3 (i.e, R1=3*R2), so I can
> choose R1 to be 3k and R2 to be 1k, OR I can choose R1=3000k and R2=1000K
> or
> (well, you got my idea...).
> Now, I understand that a very low value means high power (cause there's
> alot
> of current going to gnd) but what if I choose very high value? (like 1M and
> 3M),. it doesn't sounds good, but I can't explain why..
> Help anyone???
> Thanks,
> Roy
>
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