Fractional substraction resistive readout for position sensitive photo-multiplier tubes

摘要

A readout circuit for an imaging detector that improves resolution and increases field of view in a display compared to traditional readout circuits. The readout circuit comprises two or more amplifiers that receive a row or column of outputs from the imaging detector. Subtraction circuitry, included in the readout circuit, receives the signals from the amplifiers, determines a fractional value of the sum of the signals, and subtracts the fractional value from each signal thereby producing both positive and negative signals. A rail to rail amplifier operating from a signale voltage supply eliminates one polarity of the signals making the signals unipolar. A combining circuit receives the unipolar signals and combines them to produce two readout circuit outputs that are transmitted to a computer to be displayed.