| 摘要 |
A digital to analog converter module is provided to reduce a manufacturing cost by forming an integrated structure as one chip. A thermometer decoder(110) converts an inputted upper digital code of m bits to a thermometer code. A latch unit(120) synchronizes the thermometer code and an inputted lower digital code of m bits according to an inputted clock signal. A thermometer code current cell matrix(160) is driven by the thermometer code outputted from the latch unit in order to convert the thermometer code to analog current. First and second binary weight current cells are driven by the lower digital code of m bits outputted from the latch unit in order to convert the lower digital code of m bits to the analog current. A switching unit(130) outputs selectively the lower digital code of m bits to the first binary weight current cell or the second binary weight current cell according to a mode selection signal.
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