[time-nuts] new op amp for distribution amplifiers

[Gerhard Hoffmann]

Am 18.12.18 um 20:46 schrieb Attila Kinali:
> On Sat, 15 Dec 2018 19:02:30 +0200
> Anders Wallin <anders.e.e.wallin at gmail.com> wrote:
>
>> That got rid of the self-oscillation - but now I am left with severe (16 dB
>> @ 230 MHz) gain-peaking! (see attached figure)
> Could it be, that the stray capacitance to ground of the non-inverted
> input is now too big? You increased the feedback resistors by factor 5,
> so effect of the stray capacitance also increased roughly by a factor of 5.

That amount of peaking is a sure sign that the amplifier is still

very, very close to oscillating. John's dead bug construction with the

inputs in mid-air is probably the only way to make the SO-8 chip

work at all at this low gain. And still it's not comfortable.

cheers, Gerhard