Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Patent
1999-04-15
2000-10-17
Nuton, My-Trang
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
327362, H03B 100, H03K 300
Patent
active
061337684
ABSTRACT:
A simulation circuit has a simulation circuit path that simulates operation of the write current circuit path of a write current driver. A simulation transistor simulates operation of the driver transistor and a monitor circuit monitors current at the base of the simulation transistor to derive a compensation current based on variations in base current, including breakdown of the simulation transistor. The compensation current is combined with the driver current to derive the write driver current for the driver transistor of the write current driver. In another form, the simulation circuit path is a scaled-down electrical equivalency of the write current circuit path so that the simulation current is a scaled fraction of the write current and power requirements are reduced. In one form, current is added to the compensation current to accommodate unidirectional nature of current mirrors in the monitor circuit.
REFERENCES:
patent: 5282094 (1994-01-01), Ngo
patent: 5291347 (1994-03-01), Ngo et al.
patent: 5612828 (1997-03-01), Brannon et al.
Price John J.
Schulte Donald J.
Lucent Technologies - Inc.
Nuton My-Trang
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