Current supply circuit for driving high capacitance load in an i

Details Current supply circuit for driving high capacitance load in an i Current supply circuit for driving high capacitance load in an i

1991-01-23

1992-07-28

LaRoche, Eugene R.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072966, 3072968, 330288, H03K 3013

Patent

active

051343100

ABSTRACT:
A constant current power supply circuit for an integrated circuit memory which is well suited for driving a high capacitance load, such as a large number of sense amplifiers. A first circuit provides a constant current source and a second "current mirror" circuit provides an output current proportionate to the first circuit, but at a higher desired level of current. The constant current circuit is achieved using two cross-coupled FET transistors and two resistances such that the conductivity of each transistor is inversely related to the conductivity of the other. The circuit reaches a constant current equilibrium which is largely independent of operating voltage or load, but rather depends on the relative values of the components.

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Microelectronics, Digital and Analog Circuit and Systems, McGraw-Hill Book Company, pp. 536-548.

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