| 摘要 |
A controlled current source comprises a signal input to receive a control input bus signal (D0,.., D[n-1]), a mapping unit (MU) with an input coupled to the signal input and an output to provide an internal control bus signal (d0,.., dn, Hc), a reference generator (RG) with an input coupled to the output of the mapping unit (MU) and with a low reference output to provide a low reference potential (Vg1) and with a high reference output to provide a high reference potential (Vgh), a current generating unit (CG) with a first input coupled to the output of the mapping unit (MU), a second input coupled to the output of the reference generator (RG) and an output to provide an output current (lout) controlled by the control input bus signal (D0.., D[n-1]) and the low and high reference potentials (Vgh, Vg1). Furthermore, a method for sourcing a current is provided.
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