Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2008-04-15
2008-04-15
Lam, Tuan T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S543000, C327S563000, C330S252000
Reexamination Certificate
active
11530181
ABSTRACT:
An input voltage circuit comprises an input transistor having a control electrode for receiving a variable input voltage, a voltage detection transistor having a current electrode coupled to a current electrode of the input transistor forming a first node, and a current source coupled to a second current electrode of the voltage detection transistor forming a second node. The input voltage circuit further comprises a variable voltage drop transistor having a first current electrode coupled to the first node, a control electrode coupled to the second node and a second current electrode coupled to an output node, wherein the voltage detection transistor detects a variation in the variable input voltage and provides a signal to the variable voltage drop transistor. The variable voltage drop transistor generates a voltage drop proportional to the variation in the variable input voltage to ensure a substantially constant output at the output node.
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patent: 5708376 (1998-01-01), Ikeda
patent: 6998907 (2006-02-01), Kindt et al.
patent: 7202738 (2007-04-01), Huijsing et al.
patent: 2007/0279130 (2007-12-01), Furuta
Kase Kiyoshi
Len May
Freescale Semiconductor Inc.
King Robert L.
Lam Tuan T.
O'Neill Patrick
Singh Ranjeev
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