| 摘要 |
<p>A switched capacitor digital/analogue converter is provided, for example providing gamma correction in liquid crystal displays. The converter comprises a plurality of conversion capacitors (C<SUB>0</SUB>,...,C<SUB>n</SUB>) having first plates connected to an output line (5) and second plates connectable via electronic switches (10) to first or second reference voltages (V<SUB>ref1</SUB>, V<SUB>ref2</SUB>) in accordance with the values of corresponding bits of an input word. The converter also comprises a plurality of terminating capacitors (C<SUB>term0</SUB>,...,C<SUB>termn</SUB>), at least one of which is switchable in or out of circuit depending on the value of at least one of the bits of the input word. By suitable choice of capacitance values and reference voltages, a wide range of non-linear transfer functions can be provided by the converter.</p> |
