APPLICATION NOTE
Digital Frequency Comparator
This application note illustrates how a hierarchical all-digital design with two implementation views, can be
defined in OrCAD Capture, and subsequently simulated in PSpice. The example circuit is a basic frequency-
comparator (see Figure 1). All parts used in the schematic are provided in the standard Symbol and Model
Libraries. One implementation is chosen for PSpice simulation to demonstrate the circuit's behavior.