Arbitrary conversion ratio switched-capacitor (SC) networks design for SC bandgap reference

General methods of SC networks design for SC bandgap reference are proposed. The methods are based on the conversion between parallel and series connection of the capacitors. The prototyped SC bandgap reference is designed in 65 nm LP CMOS process. Simulation result shows that temperature coefficient of the reference voltage is achieved to 25 ppm/°C from −20 to 100°C .