Wideband current-recovery chopped-wave stabilized amplifier with low energy consumption on the basis of metal oxide semiconductor (MOS) device

Abstract

The invention discloses a wideband current-recovery chopped-wave stabilized amplifier with low energy consumption on the basis of a metal oxide semiconductor (MOS) device, belonging to the field of analog integrated circuit design. The wideband current-recovery chopped-wave stabilized amplifier comprises an up frequency mixer which is arranged in front of the input stage of an amplifier; a down frequency mixer is arranged behind the output stage of the amplifier to lower the frequency of the input signal; a shunting input stage comprises four P-channel metal oxide semiconductor (PMOS) tubes, an input voltage signal is converted into a current signal, and reverse recovery current is formed; the middle stage of amplification recovery current comprises two low-voltage current mirrors used for amplifying the recovery current and used for realizing a rail-to-rail output stage; and the signal can be subjected to rail-to-rail output. The wideband current-recovery chopped-wave stabilized amplifier can improve band width by more than two times under the condition of adding no power consumption, low-frequency 1 / f noise is lowered, low-frequency gain is increased, power consumption is lowered by half under the condition of keeping the same band width, noise and other performances, and the performance of the circuit is further improved.

Description

technical field [0001] The invention belongs to the field of analog integrated circuit design, in particular to a MOS device-based broadband low power consumption current recovery chopper stabilization amplifier. 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 e...

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Problems solved by technology

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

[0007] 2. The current sources N1 and N2 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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