Patent ID: 9170287
Filing Date: 2015-10-27
Classification: G01R

Abstract:
1. A 3D-IC differential sensing and charge sharing scheme, comprising: a plurality of high loading structures, including a first high loading structure and a second high loading structure; a tracking circuit coupled to said first high loading structure, a sensing circuit coupled to said second high loading structure and said tracking circuit; a plurality of equaling circuits each of said plurality of equaling circuits arranged between an adjacent two high loading structures of said plurality of high loading structures adjacent said first equaling circuit and coupled thereof for balancing voltage of said adjacent two high loading structures to an identical voltage; and a clamping circuit coupled to said first high loading structure, wherein said clamping circuit comprises said two sensing amplifiers, a coupling capacitor, a current generator and a comparator, capable of clamping a lower level input signal to a pre-determined reference voltage level by utilizing said positive input terminal or said negative input terminal and comparing a voltage of a first TSV of said all TSV by said comparator; wherein said equaling circuits are used to equal output voltages of said two sensing amplifiers.