Bandgap reference (BGR) circuits and methods are described herein for
providing high accuracy, low power Bandgap operation when using small,
low voltage devices in the analog blocks of the BGR circuit. In some
cases, chopped input stabilization and dynamic current matching
techniques may be combined to compensate for input voltage offsets in the
operational amplifier portion and current offsets in the current mirror
portion of the Bandgap circuit. When used together, the chopped
stabilization and dynamic current matching techniques provide a
significant increase in accuracy, especially when using small, low
voltage devices in the analog blocks to reduce layout area and support
low power supply operation (e.g., power supply values down to about 1.4
volts and below).