Simultaneously Low Power and Low Noise Single-Ended Amplifier for Neural Signals

Abstract

The invention discloses a neural signal monoamplifier capable of simultaneously achieving low power consumption and low noise. The neural signal monoamplifier comprises a cascade C-type inverter composed of PMOS devices M1 and M3 and NMOS devices M2 and M4; a capacitance feedback circuit composed of two capacitor pairs C1 and C1f, and used for keeping gain of the amplifier stable due to a feedback effect; pseudo resistors PR1 and PR2 composed of two PMOS devices and provided with great equivalent resistance, wherein the PR1 is connected with the grid of a PMOS device M5 of a reference circuit and the grid of the PMOS device M1 of the inverter circuit to provide direct current biasing at the grid of the PMOS device M1, and the PR2 is connected with the output VOUT of the inverter and the grid of the NMOS device M2 of the inverter circuit to provide the direct current biasing at the grid of the NMOS device M2; and a substrate biasing circuit composed of devices M6-M9, used for reducing substrate biasing voltage of the PMOS device M5 of the reference circuit so as to reduce a threshold voltage of the same, and at last enhancing the grid voltage of the M5 to counteract a voltage difference between two ends of the pseudo resistor PR1 under a deep submicron technology, thus achieving a better current mirror image effect.

Description

technical field [0001] The invention relates to the field of integrated circuit design, in particular to a neural signal single-ended amplifier which is applied to MOS transistors and MOM capacitors with different threshold voltages under deep submicron technology, and simultaneously realizes low power consumption and low noise. Background technique [0002] Microelectronic products are widely used in today's society and have gradually become an indispensable part of people's lives. In order to meet the needs of people to use electronic products for a longer period of time, in addition to improving the processing technology of integrated circuits, it is also necessary to use low power supply voltage Circuits are used to reduce the power consumption of products, and low-voltage and low-power consumption technology has become an important field for the development of the microelectronics industry. [0003] As the front-end circuit unit of the neural signal processing circuit, ...

AI Technical Summary

Problems solved by technology

[0007] To sum up, the traditional Class C inverter can achieve low voltage and low power consumption, but it is difficult to achieve ultra-low power consumption and ultra-low noise while achieving large gain, especially in the deep sub-micron process. problem needs to be solved

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