Optical: systems and elements – Optical modulator – Light wave temporal modulation
Reexamination Certificate
2001-05-14
2004-01-06
Epps, Georgia (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave temporal modulation
C359S290000
Reexamination Certificate
active
06674563
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The field relates to linearization of a response to a signal. More particularly, the field relates to linearizing a response, such as an intensity from a light-modulating device, to an input signal.
2. Description of the Related Art
Many systems, in response to a linear input, exhibit a highly nonlinear output response. Such a nonlinear response can complicate the control of the system output. Therefore, what is needed is a way to linearize a system output relative to a system input.
SUMMARY OF THE INVENTION
Some embodiments can comprise two relatively constant signal references coupled to each other by two or more signal components coupled in series. The first signal component can include a variable signal component controlled by an external input signal. The second signal component can include a relatively fixed signal component. The output node can include a node coupling the variable signal component and the relatively fixed signal component. The output node can provide an output signal controlling, for example, a microelectromechanical device, and/or a device controlling a modulated intensity of electromagnetic energy.
Some embodiments can comprise an input node coupled to an output node via an intermediate circuit. The intermediate circuit can comprise a logarithm circuit and/or a lookup table. The output node can provide an output signal controlling, for example, a microelectromechanical device, and/or a device controlling a modulated intensity of electromagnetic energy.
Some embodiments comprise receiving a first signal determining a first quantity responsive to the first signal, generating a second signal determined at least by a lookup table, and sending the second signal to, for example, a microelectromechanical device adapted to respond to the second signal, and/or a device adapted to respond to the second signal. The device can control a modulated intensity of electromagnetic energy.
Some embodiments can comprise receiving a first signal, determining a first quantity responsive to the first signal, generating a second signal determined at least by a quotient, and sending the second signal to, for example, a microelectromechanical device adapted to respond to the second signal, and/or a device adapted to respond to the second signal. The quotient can comprise the first quantity divided by a sum, and the sum can comprise an addition of the first quantity and a second quantity. The device can control a modulated intensity of electromagnetic energy.
Some embodiments can comprise receiving a first input, and, responsive to the first input, sending a second input to an element, for example, a microelectromechanical device, and/or a device controlling a modulated intensity of electromagnetic energy. The second input can substantially linearize the first input, over a range of the first input, relative to an output of the element. The output of the element can be substantially proportional to the first input over the range of the first input.
Some embodiments can comprise receiving a first input, processing the first input through at least one circuit to produce a second input, and sending the second input to a device controlling a modulated intensity of electromagnetic energy. The modulated intensity can be substantially proportional to the first input over a range of the first input.
Some embodiments can comprise receiving a first signal, determining a first quantity responsive to the first signal, generating a second signal determined at least by a logarithm of at least the first quantity, and sending the second signal to, for example, a microelectromechanical device adapted to respond to the second signal, and/or a device adapted to respond to the second signal. The device can control a modulated intensity of electromagnetic energy.
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Chui Benjamin Wai-ho
Godil Asif A.
Stowe Timothy
Choi William
Eakin James E.
Epps Georgia
LightConnect, Inc.
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