Input circuit for insertion of the packets of charges in a device for transfer of charges

摘要

An input circuit for a charge-transfer-device such as a bucket- brigade or charge-coupled-device incorporating an input terminal connected to an input diode source diffusion of the charge-transfer- device through a capacitor C. The nonlinear depletion capacitance C.sub.d associated with the input circuit is schematically shown connected in parallel with C at a first node. The non-linear capacitance C.sub.d, which is parasitic, is a basic cause of distortion of the input charge packets. The input circuit further includes an active device such as an IGFET connected in parallel with the input terminal to provide a supply of charge carriers. The gate of the active device is connected to a reset signal source.