On 05/22/2018 06:25 PM, Ignatius Rivaldi wrote:
Hi,
A RF noob here, what is a video filter? Does it filter video? Googling
'video filter' results in softwares that filter videos, and 'video
filter rf' results in youtube videos explaining RF filter
In this case, we're discussing active op-amp
Hi,
A RF noob here, what is a video filter? Does it filter video? Googling
'video filter' results in softwares that filter videos, and 'video filter
rf' results in youtube videos explaining RF filter
On Tue, May 22, 2018, 22:30 Müller, Marcus (CEL) wrote:
> Hi Marcus,
>
> > Use digipots to set
Hi Marcus,
> Use digipots to set the R values, and use a fixed value for C, or
perhaps selectable C as well (probably only two or three values).
friends of mine tried to do variable attenuation for powerline
communication frontends using digipots, and: these can be very
frequency-selective, even
On 05/21/2018 02:33 PM, Eric Brombaugh wrote:
Sounds like a fun study. I looked at using some of those ADRF6510 ADC
drivers with built-in programmable analog LPFs a while back. They're
highly integrated but fairly expensive and really power-hungry.
Eric
That actually compares fairly well to a
Sounds like a fun study. I looked at using some of those ADRF6510 ADC
drivers with built-in programmable analog LPFs a while back. They're
highly integrated but fairly expensive and really power-hungry.
Eric
On 05/21/2018 11:21 AM, Marcus D. Leech wrote:
On 05/21/2018 01:59 PM, Dan CaJacob wr
On 05/21/2018 01:59 PM, Dan CaJacob wrote:
Hey Marcus,
This may not be what you are looking for, but these are awesome. They
may be going to space soon :)
http://www.newedges2.com/products/SAX239-R2_Datasheet_February-27th-2018.pdf
Interesting. Not quite what I was looking for.
Basically ju
Hey Marcus,
This may not be what you are looking for, but these are awesome. They may
be going to space soon :)
http://www.newedges2.com/products/SAX239-R2_Datasheet_February-27th-2018.pdf
On Sun, May 20, 2018 at 10:13 PM li...@lazygranch.com
wrote:
> I used to work at Maxim, but my dealings wi
I used to work at Maxim, but my dealings with those RF guys dealt more
with coffee and the quality thereof.
I looked at the Maxim chip. The filter is relatively steep but not
complex. Looks like two or three poles maximum. I don't know
specifically about that chip, but that group had SiGe technol
On 05/20/2018 09:13 PM, li...@lazygranch.com wrote:
Can you be more specific about the corner frequency?
Corner frequencies step-tunable from perhaps 20Mhz down to perhaps 2MHz.
Many chips, like the R820T2, the MAX2112, and the higher-integration
devices like the AD9361 and LMS7002M have
pr
On Sun, 20 May 2018 20:54:34 -0400
"Marcus D. Leech" wrote:
> Does anyone here know how various high-integration tuners achieve
> more-or-less continuously-variable corner low-pass frequency on the
> baseband outputs?
>
> I'm aware of switched-capacitor filters, but my understanding is that
>
Does anyone here know how various high-integration tuners achieve
more-or-less continuously-variable corner low-pass frequency on the baseband
outputs?
I'm aware of switched-capacitor filters, but my understanding is that
due to the high branch ratios, you need a clock with a very high ratio
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