Array Line Driver Reference System
Original Publication Date: 1986-Jun-01
Included in the Prior Art Database: 2005-Mar-09
A push-pull driver circuit provides high current drive for both select and deselect to achieve high data rate in an unclocked memory system. In applying this reference system, the emitters of the NPN pull-down devices of each word line driver are connected to a common node voltage Vref driven by a current source. The unselected word bottom nodes WB are referenced with respect to the chip high voltage source VH. This reference system is insensitive to supply voltage tolerances and permits wide choice of decoders. In the figure, the push-pull driver circuit 10 is connected between VH and a node Vref common to a plurality N of driver circuits. The node Vref is fed by a constant current source equal to N times the unselect current I0 of an individual driver. The resulting Vref voltage tracks with VH, i.e., Vref = VH - V0 - 2.