This trigger circuit is from 80s documentation. Transistors support equivalents and capacitors depend on the type of trigger signal.
Analog Devices AD7768 24-bit sigma-delta (Σ-Δ) ADCs include an Σ-Δ modulator and digital filter...
The RC network of this circuit determines the operating frequency. The emitter-coupled circuit was found...
The operational amplifier used in this circuit is no longer very common, but the configuration can be adapted...