| 摘要 |
An integrated circuit current source (10) has first (16) and second (30) current mirrors regeneratively coupled. The transistors (32, 34) of the second mirror (30) have unequal current densities, so that a resistor (40) connected to the emitter of the lower current density transistor (34) establishes a temperature-dependent output current. One of the transistors (18, 20, 34) has its base and emitter connected together through a modifying resistor (42, 53, 55) to modify the temperature dependence of the output. In one embodiment (10), the modifying resistor (42) connects the base and emitter of the lower current density transistor (34) and increases the temperature dependence of the output to make it directly proportional to the absolute temperature. Other embodiments (52, 54) are disclosed for obtaining both zero and negative temperature coefficient values for the output.
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