Bandgap Reference Circuit. The bandgap reference technique is one of the most commonly used methods for creating a temperature independent reference voltage. Bob widlar the legendary electronics engineer laid the foundation for today s bandgap voltage references in the late 1960s.
A useful feature of this topology is that the op amp does not drive resistors and can thus maintain a high loop gain. A bandgap voltage. The theoretical circuit of a brokaw bandgap.
Their precision depends on it.
In 1971 robert widlar introduced the lm113 the first band gap reference 1it used conventional junction isolated bipolar ic technology to make a stable low voltage 1 220 v reference. This particular circuit is one type of a bandgap voltage reference named after paul brokaw the author of its first publication. 2 september 2016 v ref v be r2 r3 v be i v v be v be q1 q2 q3 r3 600 r1 600 r2 6k ground r2 r3 v be figure 1. Bob widlar paul brokaw and others followed up with other commercially successful versions.
