Super advice Ed, this is really really good advice.
Erik this is sage advice. especially CMR at high frequencies...
Oh and now LED lights overhead your bench which are driven at 5-50kHz
are are next new coupling of noise into your open bench circuits !!!
Glen.
(RF engineer)
On 13/07/2022
I've ALWAYS used an op-amp to nail down the half rail supply, I never
use the two resistors and cap idea directly unless the whole thing is
quite basic
Just don't put bulk capacitance on the output !
like I have seen in some bad designs. ROFL.
Some op-amps are better at this than
how about grounded grid ?
Bob can you get better isolation with a vaccuum tube cascode than a
solid state cascode ?
-glen
On 07/07/2022 15:22, Bob kb8tq via time-nuts wrote:
Hi
On Jul 6, 2022, at 1:53 PM, Richard Karlquist via
time-nuts wrote:
The 2N5179 has high base spreading
Carsten, around the edges of the patch are all fringing fields, so the
required coupling to the plane may be quite low, depending on the design.
The compromised ground plane may also be permitting some rear size
pickup - multipath !
I'll do some EM modelling later to try and put some numbers
Fantastic Work John !
What info this is for me is that I could have in simple applications,
have the (following) PLL loop bandwidth high enough to deal with most
low frequency microphonics ... and still not pass too much spur noise 1
kHz and up.
-glen
On 01/06/2022 03:49, John Ackermann
Hi Bob
Yeah. because we essentially have a sampled system, so I expect
multiples of the injection source.
This is a sample rate clock, and so spurs that fall at 50% of the sample
rate are OK. spurs that fall at 25% of the sample clock will appear in
the PB. Which really tells me I need to
now at about 20 db down.
Bob
On Jul 1, 2020, at 7:54 PM, glenlist <mailto:glenl...@cortexrf.com.au>> wrote:
RRR
Stability over about a 2 minute period, preferably within a Hz at
1296 MHz , IE about 1e-09 is all that is required. I'll make it and
figure out what I missed :-). The unwan
RRR
Stability over about a 2 minute period, preferably within a Hz at 1296
MHz , IE about 1e-09 is all that is required. I'll make it and figure
out what I missed :-). The unwanted sideband (and some of the original
will of course leak through depending on the DBM balance) will generate
