GPS-Disciplined Oscillator - May 2023 - Silicon Chip Online
The GPS-Disciplined Oscillator (GPSDO) is built almost entirely in software, so it only requires a PIC, an oven-conditioned crystal oscillator and a few other supporting parts. It provides an extremely accurate 10MHz signal with an error in the parts per billion range. by Alan Cashin
Source: siliconchip.com.au