Patent ID: 6133719
Filing Date: 2000-10-17
Classification: G05F,Y10S

Abstract:
A bandgap reference circuit comprising:an amplifier configured in a differential arrangement to provide an output which is determined by a potential difference of first and second input nodes of said amplifier, the output being controlled by a control line coupled to an output node on a path of the differential arrangement corresponding to the second input node;a first bipolar transistor coupled to the first input node;a second bipolar transistor coupled to the second input node and also to said first transistor, said two bipolar transistors coupled to each other and said amplifier to operate as a bandgap reference circuit; anda start-up circuitry coupled to the second input node for pulling the second input node toward a potential value relative to the first input node to prevent said two bipolar transistors from locking into a high current condition from which they cannot recover, when a start-up signal is placed on the output node.