[time-nuts] PCB layout question for GPSDO

[Matthias Welwarsky]

On Donnerstag, 27. Februar 2020 16:17:56 CET Tobias Pluess wrote:

> Attached 2 photos and the new schematic!

I'm always wondering about the merit of placing the temperature sensor close 
to the OCXO. It's certainly not the only, or maybe not even the dominant 
source of temperature related disturbance.

For example, there's the TDC7200 itself. When I tested my design first, the 
measurements had a distinct relation to temperature, in the order of maybe 
300ps/°C, but there's other stuff as well, for example, the 74ALVC74 in yours, 
the whole analog output section etc.

Wouldn't placing the temperature sensor close to a heat source make it less 
suitable for compensating those effects?

BR,
Matthias