Broadband rail-to-rail amplifier with low power consumption, realized by MOS (Metal Oxide Semiconductor) components

Abstract

The invention discloses a broadband rail-to-rail amplifier with low power consumption, realized by MOS (Metal Oxide Semiconductor) components, belonging to the field of design of analogue integrated circuits. The broadband rail-to-rail amplifier with low power consumption comprises a rail-to-rail input stage composed of four NMOS (N-channel Metal Oxide Semiconductor) transistors and four PMOS (P-channel Metal Oxide Semiconductor) transistors; the circuit transforms an input voltage signal into a current signal to form a reversed recovery current; a middle stage of an amplified recovery current, composed of four low-voltage current mirrors, can realize the amplification function on the recovery current; and a rail-to-rail output stage composed of two PMOS transistors and two NMOS transistors realizes the rail-to-rail output of the signal. In the invention, the broadband rail-to-rail amplifier has the advantages of increasing the capability of the broadband by more than two times under the condition of not increasing power consumption, increasing low-frequency gain and large signal slew rate, increasing the amplitude of an input / output signal when the amplifier works in a low-voltage environment, and the like. Each MOS transistor can be selected from conventional MOS transistors and also can be selected from strained silicon MOS tubes with high mobility so as to further improve the performance of the circuit.

Description

Technical field: [0001] The invention belongs to the field of analog integrated circuit design, in particular to a wide-band low-power rail-to-rail amplifier using a CMOS tube. Background technique: [0002] Since the 20th century, with the development of submicron and ultra-deep submicron technology and the increasing maturity of system chip technology, portable electronic products powered by batteries have achieved rapid development and rapid popularization. Since the development of battery technology is far behind the development of electronic systems, products ranging from heart pacemakers to hearing aids, mobile phones and various products have imposed strict restrictions on the supply voltage of electronic products. On the other hand, as the size of the device continues to shrink, the breakdown voltage of the process is also reduced, which also imposes strict restrictions on the power supply voltage. The performance requirements of electronic devices are getting highe...

AI Technical Summary

Problems solved by technology

[0006] 1. Compared with other types of amplifiers, its static power consumption is high

[0007] 2. The current sources P3, P6, N3, and N6 are only used as current sources and are not used to transmit small signal currents, which is a kind of "waste".

[0008] 3. In the case of strict power consumption requirements, it is difficult to achieve high bandwidth performance

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