| 摘要 |
A band-gap reference circuit (500) is disclosed which receives power from a first filter node (526) and a second filter node (528). In the preferred embodiment, the band-gap reference circuit (500) includes a reference stage (502), a first start-up circuit (504), and a second start-up circuit (506). The reference stage (502) generates a reference voltage (Vref). The start-up circuits (504 and 506) apply voltages to bias nodes within the reference stage (502) which enable the reference stage (502) to function at the lower voltages as the preferred embodiment (500) is powered up. To reduce the susceptibility of the band-gap reference circuit (500) to variations in the power supply voltages, such as those resulting from noise, a first filter (532) filters a first power supply voltage (Vcc) and applies the filtered voltage (Vccf) to the first filter node (526). A second filter (528) filters a second power supply voltage (Vss) and applies the filtered voltage (Vssf) to the second filter node (528). <IMAGE> |
