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US 6,634,555 B1Granted
Bar code scanner using universal frequency translation technology for up-conversion and down-conversion
AssigneeParker Vision, Inc.
InventorsDavid F. Sorrells, Michael J. Bultman, Robert W. Cook, Richard C. Looke, Charley D. Moses, Jr.
Life of this patent
Estimating the term…
Abstract
Frequency translation and applications include, but are not limited to, frequency down-conversion, frequency up-conversion, enhanced signal reception, unified down-conversion and filtering, and combinations and applications of same.
Claims12
A bar code scanner, comprising:
- a bar code reader that reads a bar code;
- and
- a transmitter comprising a switch module that gates a bias signal according to a first control signal to create a periodic signal having a plurality of harmonics, including at least one harmonic desired to be transmitted, said bias signal or said first control signal being a function of information representative of said bar code.
A bar code scanner, comprising:
- a bar code reader that reads bar codes;
- and
- a transceiver comprising a switch module that gates a bias signal according to a first control signal to create a periodic signal having a plurality of harmonics, including at least one harmonic desired to be transmitted, said bias signal or said first control signal being a function of information representative of said bar codes.
A method for processing a bar code, comprising the steps of:
- (1) reading a bar code representing an object;
- and
- (2) gating a bias signal according to a control signal to create a periodic signal having a plurality of harmonics, including at least one harmonic desired to be transmitted, said bias signal or said control signal being a function of information representative of said bar code.
Dependencies are inferred from the claim text.