Optical code reader having a controllable amplifier and methods therefor
First Claim
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1. An apparatus comprising:
- an optical detector;
an amplifier having an input, an output, and a control input, the input responsive to the optical detector;
a comparator responsive to the output of the amplifier;
a data communication circuit responsive to the comparator;
an optical emitter responsive to the data communication circuit;
a multi-bit analog-to-digital converter responsive to the output of the amplifier; and
a processor responsive to the multi-bit analog-to-digital converter and to the data communication circuit, the processor to read a first sample from the multi-bit analog-to-digital converter while the optical emitter is cooperating with the data communication circuit to transmit a message, the processor to apply a first signal to the control input of the amplifier in response to determining that the first sample is beyond a first threshold.
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Abstract
An amplifier has an input responsive to an optical detector. A comparator is responsive to an output of the amplifier. A data communication circuit is responsive to the comparator. An optical emitter is responsive to the data communication circuit. A multi-bit analog-to-digital converter is responsive to the output of the amplifier. A processor reads a sample from the multi-bit analog-to-digital converter while the optical emitter is cooperating with the data communication circuit to transmit a message. The processor applies a signal to a control input of the amplifier in response to determining that the sample is beyond a threshold.
20 Citations
26 Claims
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1. An apparatus comprising:
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an optical detector; an amplifier having an input, an output, and a control input, the input responsive to the optical detector; a comparator responsive to the output of the amplifier; a data communication circuit responsive to the comparator; an optical emitter responsive to the data communication circuit; a multi-bit analog-to-digital converter responsive to the output of the amplifier; and a processor responsive to the multi-bit analog-to-digital converter and to the data communication circuit, the processor to read a first sample from the multi-bit analog-to-digital converter while the optical emitter is cooperating with the data communication circuit to transmit a message, the processor to apply a first signal to the control input of the amplifier in response to determining that the first sample is beyond a first threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method comprising the steps of:
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providing an apparatus having an optical detector, an amplifier, a comparator, a data communication circuit, an optical emitter, and a multi-bit analog-to-digital converter, the amplifier having an input responsive to the optical detector, the amplifier having an output and a control input, the comparator responsive to the output of the amplifier, the multi-bit analog-to-digital converter responsive to the output of the amplifier, the data communication circuit responsive to the comparator, the optical emitter responsive to the data communication circuit; transmitting a message using the optical emitter in cooperation with the data communication circuit; reading a first sample from the multi-bit analog-to-digital converter while transmitting the message; and applying a first signal to the control input of the amplifier in response to determining that the first sample is beyond a first threshold. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification