Patent ID: 8228053
Filing Date: 2012-07-24
Classification: G05F

Abstract:
1. A method for startup circuits of bandgap voltage reference generator circuits monitoring a current flow in the bandgap voltage reference generator circuit, comprising the following steps: (1) providing a current-mode bandgap voltage reference generator circuit and a startup circuit comprising a current detection circuit; (2) monitoring a current flow in the bandgap voltage reference generator circuits by the current detection circuit; (3) injecting a startup current to the bandgap voltage reference generator circuit by the startup circuit as long as said current monitored is below a limit defined; (4) disengage functionally the startup circuit after said current monitored has reached said limit defined and the bandgap voltage reference generator circuit has reached its operating range; and (5) regulating, right after the bandgap voltage reference generator circuit has reached its operating range, an internal voltage of the bandgap voltage reference generator in order to reach the bias point desired of the bandgap voltage reference generator.