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A bandgap reference voltage source（BGR）adopting a composite compensation method was designed. Based on the Banba-type bandgap reference topology，an additional BJT branch and compensation resistors were utilized to cancel the high-order effects of the base-emitter voltage（V）. A piecewise compensation circuit was also incorporated to achieve curvature compensation over a wide temperature range. Meanwhile，a digital trimming circuit was employed to further reduce the impact of process variations on circuit performance. Designed in the SMIC 180nm BCD process，post-layout simulation results showed that the reference source could stably output a voltage of 800mV with a temperature coefficient of 0.98×10/℃over the temperature range of-40-150℃. When the supply voltage varied from 1V to 3.3V，the output drift was 5.4mV，with a line regulation of less than 0.23%.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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