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US 5,212,458 AGranted
Current mirror compensation circuit
AssigneeTriQuint Semiconductor, Inc.
InventorsMark E. Fitzpatrick, Robert C. Burd
Life of this patent
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AssigneeTriQuint Semiconductor, Inc.
InventorsMark E. Fitzpatrick, Robert C. Burd
Estimating the term…
A current mirror compensation circuit is disclosed herein which automatically adjusts the operating conditions of a current mirror so as to compensate for the voltage dependent current characteristics of a current load which a current mirror output is intended to match. In one embodiment, this compensation circuit compares a voltage level at the output of a current source with a voltage level at a corresponding node in the current programming portion of a current mirror. If a difference in these voltages is detected, the compensation circuit adjusts the current flow through the current programming portion of the current mirror to be equal to the output current through the current source. Therefore, since the current mirror output portion mirrors the current through the programming position, the currents through the output portion will match the current through the current source.
A compensation circuit connected in a current matching circuit, said current matching circuit including a current mirror programming portion, a current mirror output portion, and a current load output portion, said compensation circuit comprising:
Dependencies are inferred from the claim text.