Output driver for reducing transient noise in integrated circuit

Details Output driver for reducing transient noise in integrated circuit Output driver for reducing transient noise in integrated circuit

1993-06-04

1994-03-08

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307443, 307263, 307451, 307572, 307585, H03K 426, H03K 501, H03K 1716

Patent

active

052930823

ABSTRACT:
A capacitive load is charged and/or discharged in sequential current steps, thereby rapidly changing the charge on the capacitive load. The stepwise change in load current can be effected by a plurality of parallel output driver stages each of which is much smaller, and thus generates less noise, than a single output driver stage with the same overall current carrying capacity. The output driver stages are connected to the load so as to be sequentially actuated responsive to an input signal representative of the binary state to be coupled by the output drive to the load. The input signal is connected to the respective output driver stages by predriver stages. Except for the lowest order predriver stage, each predriver stage has an enable circuit that switches on the driver stage at the desired point in the transition interval between binary states.

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