TCAD and SPICE are used to simulate the response from a detector with a large detector-thickness-to-pixel-pitch ratio. The model indicates that the initial rising edge of the Shockley–Ramo current signal on the readout electrode has a very sharp rise time (~16ps), with an amplitude that is directly proportional to the weighting field. A silicon detector with this time resolution would have direct applications to high-energy particle physics. The modeled signal response will be validated on a sensor from a previous 8” wafer development with a pixel pitch of 30 x 100 µm and a thickness of 200 µm. The simulated induced current signal is of relatively small amplitude so a low-capacitance low-noise readout chain will be required. The simulated detector response and weighting field and proposed readout chain will be presented.