Title :
A supply insensitive resistor-less bandgap reference with buffered output
Author :
Acharya, Venkatesh ; Banerjee, Bhaskar
Author_Institution :
Texas Instrum., Dallas, TX, USA
Abstract :
This paper describes a bandgap reference that doesn´t use resistors or operational amplifiers. The circuit uses ratioed transistors in strong inversion with the inverse function technique to develop a voltage, proportional to the absolute temperature term of the reference. With the low-output impedance at the output, this reference voltage can drive resistive loads. Unlike its predecessor, this circuit´s performance doesn´t degrade with variations in supply voltage. The bandgap was designed on a 0.6μm process and the corresponding BSIM3 (V3.2) models are used.
Keywords :
buffer circuits; energy gap; impedance matching; operational amplifiers; reference circuits; resistors; BSIM3 (V3.2) models; absolute temperature term; buffered output; inverse function technique; low-output impedance; operational amplifiers; ratioed transistors; reference voltage; resistive loads; resistors; supply insensitive resistor-less bandgap reference; supply voltage; Impedance; Logic gates; Photonic band gap; Power supplies; Resistors; Temperature sensors; Transistors; Analog; Bandgap reference; inverse function; resistive loads;
Conference_Titel :
Circuits and Systems Workshop (DCAS), 2010 IEEE Dallas
Conference_Location :
Richardson, TX
Print_ISBN :
978-1-4244-9535-1
Electronic_ISBN :
978-1-4244-9534-4
DOI :
10.1109/DCAS.2010.5955044