On 8/31/16 12:01 PM, Mark Sims wrote:
You have to be careful choosing a linear regulator to clean up a switching
supply. Many just wind up passing the noise through. Pay attention to the
noise, PSRR and CMRR vs frequency specs, etc
Indeed..
a lot of monolithic regulators have a remarkably low cutoff frequency.
On the other hand, the LT3042 has 80 dB PSRR up to a few MHz. 55dB at
10 MHz.
Take a look at the "voltage regulation" section of that home built VNA page for
an example:
http://hforsten.com/cheap-homemade-30-mhz-6-ghz-vector-network-analyzer.html
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