That's what I thought.
If you have a logic level source oscillator, a circuit would be:
source -> single gate1 ---> single gate2 -> resistor ---> output
|-> single gate2 -> resistor -|
'-> single gate2 -> resistor -'
where gate2 is a driving gate (e.g 74lvc1g14, 74lvc1g04, 74ac14, 74ac44) and gate1 is anything (but probably also a gate1)
If you have a sine wave oscillator it would be:
source -> bias -> single gate1 ---> single gate2 -> resistor ---> output
|-> single gate2 -> resistor -|
'-> single gate2 -> resistor -'
where gate2 is as above but gate1 is ideally a schmitt trigger, and the bias circuit places the AC sine wave in the middle of the threshold region.
But personally I would do:
single gate1 RC oscillator---> single gate2 -> resistor ---> output
|-> single gate2 -> resistor -|
'-> single gate2 -> resistor -'
where the oscillator is the traditional RC network wrapped around an inverting schmitt trigger (e.g. a *14).