Wide-range variable dynamics using switched capacitor neuromorphs

The use of switched capacitors as wide-range programmable resistive elements in spatially extensive artificial dendritic trees is described. We show that silicon neuromorphs with artificial dendritic trees can produce impulse responses that last nine orders of magnitude longer than the initiating impulse and that the responses are tunable in both shape and duration over five orders of magnitude. The dendritic tree switched capacitor resistors are shown indirectly to have a useful programmable resistance range between 500 kΩ and 1000 GΩ. Experimental results are presented that demonstrate impulse response tuning and rate-invariant neuromorph behavior from widely different spatiotemporal input patterns