[time-nuts] Power supply for time source concerns

[jimlux]

On 12/22/19 1:18 PM, Poul-Henning Kamp wrote:
> --------
> In message <1958104416.2586171.1577043445646 at mail.yahoo.com>, Taka Kamiya via t
> ime-nuts writes:
> 
>> First question to the group is, how do YOU manage this problem?
> 
> It used to be that there were only one kind of switching power-supply: The noisy ones.
> 
> That is no longer true by definition, but there is no easy road to this particular Damascus.

My strategy is DC/DC converter to get close, and high PSRR LDO linear 
regulator to the final voltage. Close attention to the DC/DC converter 
input and output so you don't couple to the ultimate output through 
radiated or parasitic conducted paths.

The LT3042 series regulators have high PSRR, are available with negative 
voltages now, and can be paralleled for more current capacity.