METHODS AND APPARATUS FOR LOW INPUT VOLTAGE BANDGAP REFERENCE ARCHITECTURE AND CIRCUITS

摘要

In some embodiments, an apparatus includes a bandgap reference circuit having a first bipolar junction transistor (BJT) that can receive a current from a node having a terminal voltage and can output a base emitter voltage. The apparatus also includes a second bipolar junction transistor (BJT) having a device width greater than a device width of the first BJT. The second BJT can receive a current from a node having a terminal voltage and output a base emitter voltage. In such embodiments, the apparatus also includes a reference generation circuit operatively coupled to the first BJT and the second BJT, where the reference generation circuit can generate a bandgap reference voltage based on the base emitter voltage of the first BJT and the base emitter voltage of the second BJT.

主权项

1. An apparatus, comprising:
a bandgap reference circuit having:
a first bipolar junction transistor (BJT) configured to generate a base emitter voltage of the first BJT based on an input voltage of the first BJP that is lower than the base emitter voltage;a second bipolar junction transistor (BJT) having a device width greater than a device width of the first BJT, the second BJT configured to generate a base emitter voltage of the second BJT based on an input voltage lower of the second BJT that is than the base emitter voltage of the second BJT; anda reference generation circuit operatively coupled to the first BJT and the second BJT, the reference generation circuit configured to generate a bandgap reference voltage based on the base emitter voltage of the first BJT and the base emitter voltage of the second BJT.