| 摘要 |
<p>A band-gap reference circuit (20,30,10) generates and supplies a predetermined stable voltage (VREF). The band-gap reference circuit (20,30,10) is comprised of three major circuits: a start-up circuit (20), which is comprised of a start-up transistor (21a) that is smaller than each of those in a band-gap circuit (10) which generates a predetermined stable voltage (VREF) and which outputs a start signal (S1); a signal level converter (30), which converts said start signal (S1) to a second start signal (S2) that is supplied to said start-up transistor (21a); and the band-gap circuit (10). The start-up transistor (21a) has a threshold voltage with its absolute value being smaller than each of those of the threshold voltages of transistors in said band-gap circuit (10). Moreover, the start-up transistor (21a) is (1/n) the channel length of said reference-voltage generation transistor and (1/n) the channel width of said reference-voltage generation transistor, where said n denotes a certain positive number larger than 1. <IMAGE></p> |
