| 摘要 |
PURPOSE: A linear interpolation circuit is provided to realize a low cost by using a capacitor. CONSTITUTION: The linear interpolation circuit comprises: first and second registers(10, 20) each for storing an input data in response to a write signal; a multiplexer(30) for selectively outputting the data from the registers in response to a first control signal; an analog converting part(40) for converting the data selected by the multiplexer(30) into an analog signal in response to a second control signal; second and third switches(SW2, SW3) coupled in parallel to each other, for switching paths of signals outputted from the analog converting part in response to fourth and sixth control signals; first and second capacitors(C1, C2) for accumulating charge of each signal outputted through the second and third switches; a fourth switch for connecting the first and second capacitors in series in response to a seventh control signal; a first switch for feeding back the charge accumulated in the second capacitor to the analog converting part in response to a fifth control signal; a fifth switch switched by a fifth control signal, for outputting a signal converted into an analog signal; and a control part(50) for outputting and controlling the control signals corresponding to each part and each switch at an appropriate timing.
|
