Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Patent
1996-02-29
1998-07-21
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
327309, 327319, 327407, 327170, 326 86, 326 30, H03H 1128, H03K 301
Patent
active
057839638
ABSTRACT:
An ASIC (5) has four driver circuits (19a-19d), each with different output power. One of those driver circuits is selected from the content of register (13) on the ASIC. The register content being decoded by a decoder (15) on the ASIC to a signal which activates a single one of the drivers. The register is loaded from an external microprocessor during each initialization of a printer (1) in which the ASIC is a component. The ASIC is designed with the range of the powers of the drivers bracketing the estimated needs of the load to be attached to the ASIC. This permits the ASIC to be completed only once, while the most suitable driver for the final load is determined subsequently and selected by the entry of data to activate that driver into the register with each initialization of the printer. The ASIC need not have nonvolatile memory and only a single set of ASIC masks and other design aspects need be completed.
REFERENCES:
patent: 5107230 (1992-04-01), King
patent: 5162672 (1992-11-01), McMahan et al.
patent: 5294845 (1994-03-01), McMahan et al.
patent: 5319258 (1994-06-01), Ruetz
patent: 5361003 (1994-11-01), Roberts
patent: 5418911 (1995-05-01), Zilka et al.
patent: 5479123 (1995-12-01), Gist et al.
Garnett Sean Foster
Parker Terry Lee
Richey John Parker
Spina Warren John
True Larry Wayne
Brady John A.
Callahan Timothy P.
Le Dinh T.
Lexmark International Inc.
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