Patent Number: 6,294,902

Title: Bandgap reference having power supply ripple rejection

Abstract: A bandgap reference circuit provides an output reference voltage that is generally insensitive to fluctuations in supply voltage, ambient temperature, and output load current. A current regulator establishes an output whose variations are reduced, preferably logarithmically, relative to variations in a supply voltage. A bandgap generator fed by the output current provides an output reference voltage with similarly suppressed variations. A control amplifier biases the bandgap generator to provide a high level common-mode rejection of various error sources.

Inventors: Moreland; Carl W. (Oak Ridge, NC), Young; Marvin J. (Greensboro, NC)

Assignee: Analog Devices, Inc.

International Classification: G05F 3/30 (20060101); G05F 3/08 (20060101); G05F 001/40 (); G05F 003/20 ()

Expiration Date: 09/25/2018