Patent ID: 7963445

Claim:
An arrangement for suppressing electromagnetic radiation interference in an imaging reader, comprising: a) a solid-state imager for capturing return light from a target over a field of view, for generating image data from the captured light, and for generating a pixel clock signal having a pixel clock frequency in synchronism with the image data; b) a controller operatively connected via an electrical conductor to the imager, for controlling the imager to transfer the image data, for receiving the image data transferred along the conductor, and for processing the image data into processed information indicative of the target; and c) a suppression circuit for suppressing electromagnetic radiation generated by the conductor during transfer of the image data, the suppression circuit including 1) a spread spectrum modulator operatively connected to the imager, for modulating the pixel clock signal to generate a variable spread spectrum signal having a spread spectrum frequency that periodically varies above and below the pixel clock frequency, and 2) a buffer having a plurality of registers operatively connected to the imager, for receiving and temporarily storing the image data, and operatively connected to the spread spectrum modulator for varying as a function of the spread spectrum frequency how much of the image data is being temporarily stored.