Dynamic Body Bias Type C Inverter and Its Application

Abstract

The invention discloses a dynamic body biasing class-C inverter and application thereof. The dynamic body biasing class-C inverter provided by the invention comprises a switch body biasing class-C inverter, a first gain boosting module, a second gain boosting module, a P-channel metal oxide semiconductor (PMOS) body potential modulation module and an N-channel metal oxide semiconductor (NMOS) body potential modulation module, wherein the body ends of two input tubes of the switch body biasing class-C inverter are independently led out to be connected with a switch and perform dynamic body biasing by the switching of the switch, so that the two input tubes have different parameters such as threshold value voltages, transconductances and the like at different switch phases. The inverter hasthe advantages of high DC gain, relatively higher process fluctuation resistance, relatively higher power voltage disturbance resistance, relatively higher temperature deviation resistance and the like, simultaneously greatly reduces the static power consumption of the class-C inverter in a sub-threshold value state, can form a switching capacitance integrator having a pseudo-differential structure, and is applied to application occasions such as 2-1 cascaded Sigma-Delta analogue-to-digital converters and the like with extremely low power consumption and high accuracy.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, and in particular relates to a class-C inverter and an application circuit thereof. Background technique [0002] In traditional analog circuit design, the operational amplifier is the main functional module, and it is widely used in sample-and-hold, algebraic operations, common-mode feedback, and buffer circuits. At the same time, the operational amplifier is also the main power consumption module in the analog circuit. At present, low voltage and low power consumption are the mainstream trend in the development of analog circuit design. Therefore, how to implement an operational amplifier that meets the specification requirements in a low-voltage and low-power consumption environment has become the focus and difficulty of analog circuit design. [0003] It is a new low-voltage low-power circuit design technique to replace the traditional operational amplifier with a class-C invert...

AI Technical Summary

Problems solved by technology

However, the problem with the above-mentioned gain bootstrap type C inverter is that in order to ensure that the gain bootstrap type C inverter has sufficient bandwidth and slew rate in the high slew rate state (especially in SS process corner, low power supply voltage and low temperature), the size of the gain bootstrap C-type inverter input tube is generally relatively large, and the PMOS body potential modulation module and the NMOS body potential modulation module respectively apply positive voltage to the PMOS input tube M1 and NMOS input tube M2. Body-biased, and these measures lead to unnecessary and high static power consumption when the gain-bootstrapped Class-C inverter is in the subthreshold state

Images