Data extraction threshold circuit and method
First Claim
1. A circuit extracting data from a signal stream comprising:
- a data stream terminal for receiving the signal stream;
a peak detector having an input coupled to the data stream terminal and an output;
a valley detector having an input coupled to the data stream terminal and an output coupled to the output of the peak detector at a node;
a pre-amplifier having an input coupled to the node, an input connected to the data stream terminal, and an output; and
a data comparator having a first input connected to the node, a second input connected to the output of the pre-amplifier, and a data output.
1 Assignment
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Accused Products
Abstract
A circuit for setting a threshold level for extracting data from a signal stream includes a terminal couplable to the signal stream. A peak detector is coupled to the terminal. A valley detector is coupled to the terminal. A comparator is coupled to outputs of the peak detector and the valley detector for generating a threshold voltage for extracting data or commands from the signal stream. A method of extracting data from a signal stream including: peak detecting the signal stream to generate a first signal; valley detecting the signal stream to generate a second signal; combining the first and second signals to generate a threshold signal; and extracting data from the signal stream utilizing the threshold level signal.
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Citations
13 Claims
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1. A circuit extracting data from a signal stream comprising:
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a data stream terminal for receiving the signal stream; a peak detector having an input coupled to the data stream terminal and an output; a valley detector having an input coupled to the data stream terminal and an output coupled to the output of the peak detector at a node; a pre-amplifier having an input coupled to the node, an input connected to the data stream terminal, and an output; and a data comparator having a first input connected to the node, a second input connected to the output of the pre-amplifier, and a data output. - View Dependent Claims (2, 3, 4, 5)
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6. A method of extracting data from a signal stream comprising:
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peak detecting the signal stream to generate a first signal; valley detecting the signal stream to generate a second signal; combining the first and second signals to generate a threshold signal; receiving the signal stream at a first input terminal of a preamplifier; coupling a second input terminal of the preamplifier to the threshold signal; and comparing the output of the preamplifier to the threshold signal to extract data from the signal stream. - View Dependent Claims (7)
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8. In a primary side wireless power transmitter for being inductively coupled to a secondary side wireless power receiver for supplying power to the wireless power receiver to power a load coupled to the wireless power receiver, a primary side controller receiving communications from the secondary side wireless power receiver through the inductive coupling, comprising:
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a peak detector receiving a signal stream from the secondary side wireless power receiver and having a peak output coupled to a node; a valley detector receiving a signal stream from the secondary side wireless power receiver and having a valley output coupled to the node; a pre-amplifier having an input coupled to the node, an input connected to the signal stream, and an output; and a comparator having a first input coupled to the node, a second input coupled to the output of the pre-amplifier, and a data output. - View Dependent Claims (9, 10, 11)
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12. A method of operating a primary side wireless power transmitter inductively coupled to a secondary side wireless power receiver for supplying power to the wireless power receiver to power a load coupled to the receiver comprising:
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peak detecting a signal stream from the wireless power receiver to generate a first signal; valley detecting the signal stream to generate a second signal; generating a threshold voltage signal from the first and second signals; receiving the signal stream at a first terminal of a preamplifier; coupling a second terminal of the preamplifier to the threshold voltage signal; and comparing the output of the preamplifier to the threshold signal to extract data from the signal stream. - View Dependent Claims (13)
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Specification