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Bandgap Design Tool
This tool calculates different circuit element values needed in a design a simple bandgap circuit. The tool will not model the exact nature of the bandgap. The intention is to give users a starting point in the design. This design can further be optimized using SPICE simulators.
Note: Startup circuit is not designed in this tool

Block diagram

Inputs
Supply Voltage V
PTAT Current in one leg (Iptat) uA
Ratio of D2 to D1 devices n
VBEon V
Vbg (~ 1.2V) V
uP.Cox (PMOS transistors) uA/V^2
uN.Cox (NMOS transistors) uA/V^2
Vdsat (PMOS transistors) V
Vdsat (NMOS transistors) V
Length of PMOS devices Lp um
Length of NMOS devices Ln um
 
Outputs
Width of PMOS transistors (Wp) um
Width of NMOS transistors (Wn) um
Resistor R2 kohms
Resistor R1 kohms
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