Introduction: The Enduring Relevance of the MC1496 In an era dominated by digital signal processing (DSP) and software-defined radio (SDR), the analog multiplier remains a cornerstone of radio frequency (RF) design education. At the heart of this analog renaissance sits the MC1496 – a balanced modulator/demodulator chip from ON Semiconductor (formerly Motorola).

Why? The MC1496 relies on balanced transistor pairs and internal current sources. Creating a perfect SPICE model for it is non-trivial. Many Proteus users instead substitute the NE612 (Gilbert cell mixer) or build discrete transistor circuits. However, these workarounds lack the exact behavior of the MC1496’s biasing flexibility.

Close any open Proteus ISIS instances. Relaunch the software. The library index rebuilds automatically.

Paste the MC1496.LIB and MC1496.IDX files into the LIBRARY folder.

By default on Windows: C:\ProgramData\Labcenter Electronics\Proteus 8 Professional\LIBRARY (Note: ProgramData is hidden; you might need to show hidden files.)