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

[Mattias Rickardsson]

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