| 摘要 |
An analog to digital converter (200, 300, 400) comprises a sink current circuit (200, 438, 440, 442) responsive to an input voltage for generating at least two sink currents. A source current circuit (300, 404, 406, 408, 418, 420, 422, 456, 458, 460) for generating at least three weighted source currents is coupled to the sink current circuit at summing nodes (424, 426, 428) in order to produce at least two digital output signals (D0, D1, D2). A switching circuit (444, 446, 448) is coupled to the source current circuit for enabling selected source currents in response to the digital output signals.
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