What it is
CapRAM computes a multiply-accumulate using a variable capacitor rather than a resistor or transistor. The weight is stored as a programmable capacitance; applying an input modulates charge; charge accumulates to produce the analog MAC result. Because the mechanism is capacitive (see Charge-Domain Compute):
- it draws near-zero static current (no continuous current path like resistive RRAM/PCM), the root of the ~20× chip-level energy-efficiency claim;
- capacitance is set by geometry, so it is precise, linear, and temperature-stable relative to resistive analog;
- the devices are non-volatile and stack vertically via 3D Monolithic Integration, so compute density scales by adding layers rather than by buying leading-edge lithography.