The Design of a High-Performance CMOS Operational Amplifier
In order to adapt to the current development trend of chips towards high-speed circuits.In this paper,It designs a high-bandwidth,high-gain and high-performance operational amplifier circuit.It uses a 28-nm process of deep sub-micron CMOS and a 1.8V supply voltage of the IO port.This circuit mainly uses gain bootstrap enhance-ment technology combined with cascode structure to improve the gain of the amplifier.It completes circuit design and Spectre simulation verification in Cadence environment.The simulation results show that the circuit's DC gain reaches more than 96 dB,the unity gain bandwidth is 251 MHz,the supply voltage rejection ratio is 86.7 dB,the slew rate is 33 V/us(the load capacitance is 1pF),and the power consumption is less than 0.15 mW,achieving low circuit power consumption.This has important reference value in high-speed circuit comparison,filtering and other applications.
Operational amplifiercascodegain bootstrapunity gain bandwidth
NETL
NSTL
万方数据
