Charge domain mathematical engine and method

An analog multiplier comprising:

• an active pixel comprising at least one of a pinned photodiode or other photodetector, wherein input information to the active pixel is stored on a first input charge reservoir;
• a second charge reservoir coupled to the first reservoir;
• a transfer gate positioned between the first charge reservoir and the second charge reservoir, wherein a first rate of charge of movement may be controlled by a field coupled to the transfer gate;
• and
• a second charge movement device coupled to the second charge reservoir, wherein a second rate of charge movement may be programmed in proportion to that of said first rate of charge movement;
• wherein a first charge is loaded into the first charge reservoir only during a first cycle and the transfer gate and the second charge movement device move charge proportionally during a second cycle until the first charge reservoir is depleted to produce a charge multiplication on the second charge reservoir at the end of the second cycle.