On pages 90 and 91 of:
http://www.kennethkuhn.com/hpmuseum/scans/hp5065a_part3.pdf
You can see how HP used an op-amp for the integrator in later revs.
I have the older style semi-discrete integrator (seen on page 32-33
in the same pdf), and reason to think it is quite temperature
sensitive so I want to upgrade, and will produce a PCB.
The plan is to use the schematic on page 91, but to also add a
prototyping area on the board for further experimentation (for
instance modern auto-zero op-amps)
Before I do that I want to hear if anybody else would be interested ?
I havn't done the math/pricing, but I expect that total cost would
be approx $10, including postage for a regular letter.
Reply by private email please.
Poul-Henning
(If somebody more qualified or better connected to PCB manufacturing want
to help me with this, I'd be very happy. PCBs is not my core competency.)
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
p...@freebsd.org | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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