For decades, the MC1496 (originally from Motorola, now onsemi) has been a workhorse of analog design. Known as a "balanced modulator/demodulator," it is the go-to integrated circuit for building Gilbert cell mixers, amplitude modulators, phase detectors, and frequency doublers.
Error 1: "Unknown Subcircuit" or "No Model Found" Proteus Mc1496 Lib
Configuring the Mc1496
Check the Labcenter Electronics forum (Proteus's developer). In the "Models and Updates" section, releases after 2021 sometimes include an updated ANALOG.MLI file that contains the MC1496. If you own a legitimate license, run the "Check for Library Updates" from the Proteus menu. the MC1496 (originally from Motorola