A detailed analysis of this circuit is beyond the scope of his paper but there have been several articles written on this circuit, including Demystifying Analog Circuits in Professional Audio ...

Figure 1 Schematic of the logic gate buffer circuit, which converts the high output impedance, 10 MHz clock to a 50Ω output. The very small section of the demonstration PCB that includes this logic ...

One of these areas is interfacing to the sampling networks of analog-to-digital-converters. Today's high-performance A/D converters are based on highly oversampled multi-bit delta-sigma conversion ...