Re: Transistors

On Sat, 17 Nov 2007 18:40:25 GMT, the renowned Jan Panteltje
<pNaonStpealmtje@xxxxxxxxx> wrote:

On a sunny day (Sat, 17 Nov 2007 09:15:55 -0800) it happened John Larkin
<jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in
<b68uj3t6l5vcvdsa3sfmotolhg8ktkac0s@xxxxxxx>:

On Sat, 17 Nov 2007 08:17:27 -0800 (PST), Winfield
<winfieldhill@xxxxxxxxx> wrote:

On Nov 17, 8:16 am, Fred Bloggs wrote:
John Larkin wrote:

It's this one:

[...snip...]

Please refrain from linking us to that really boring stuff.
I have told you time and again that your work makes me ill,
very boring pedestrian stuff.

and this is almost done, except for the idiotic TI opamp
problems:

What's the problem with the 'TI opamp'? Tell us something
interesting.

Yes, I seem to remember that was discussed on
another thread, right John?

Yup. THS3062, practically a unique opamp, blinding fast with +-15
supplies. But if it's amplifying a sine wave at, say, 20 volts p-p
out, and the frequency goes up to roughly 12 MHz, it crashes, pulls
tons of power, gets red hot, and phase inverts! If you drop the input
signal way down, it recovers!

Well, John!!!! the data*** specifies input common mode range as +-13.9V MAX.
Page 3 of ths3062.pdf.
It is a video amp :-)

That's 27.8V p-p, and that's the guaranteed minimum CM range, not the
maximum. Allowable input range is +/-Vs where Vs can be as high as
16.5VDC.

It's not clear what Bad Thing happens if you exceed the Absolute
Maximum Vid of +/-3V though.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@xxxxxxxxxxxx Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
.

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