[sdiy] Spare op-amp useful in gain stage?

[Richie Burnett]

I can't see any obvious reason why not.  But amplifiers are *usually* kept 
in their linear region to minimise distortion.

-Richie,


-----Original Message----- 
From: Mattias Rickardsson
Sent: Thursday, January 28, 2016 11:57 PM
To: Richie Burnett
Cc: synthdiy diy
Subject: Re: [sdiy] Spare op-amp useful in gain stage?

On 28 January 2016 at 23:17, Richie Burnett
<rburnett at richieburnett.co.uk> wrote:
> Putting multiple amplifiers in parallel lowers the noise level.

The "multipath amplifiers" approached mentioned. :-)

The question is if it's alright to tie their outputs together even if
the op-amps can reach their clip level?

> Cascading two lower gain amplifiers to replace a single high-gain stage
> allows a much wider bandwidth to be achieved if this is a design goal, but
> this wider bandwidth will then let through more noise.  It really depends
> what parameter you are trying to *improve* about your amplifier by 
> throwing
> more op-amps at it.

Primarily lower noise.

/mr
_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7357 / Virus Database: 4522/11506 - Release Date: 01/28/16