| 摘要 |
A band-gap voltage reference circuit comprising first and second branches respectively including first and second groups of transistors of different emitter current conduction areas and current sources for running the first and second groups of transistors at different emitter current densities to generate respective base-emitter voltages, and output terminals connected to receive a regulated voltage (Vout) which is a function of the base-emitter voltages of the first and second groups of transistors. Each of the first and second groups includes at least one npn-type transistor and at least one pnp transistor connected with their emitter-collector paths in series in the respective one of the branches so as to present cumulated base-emitter voltages across the respective group. The output voltage at the output terminals is responsive both to a difference (ΔVbep+n) between the cumulated base-emitter voltages of the first and second branches and to the cumulated base-emitter voltage (Vbep+n) of that one of the first and second groups with higher emitter current density.
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