Lower voltage conductor-spanning amplifier capable of improving the linearity and input range

Abstract

The invention relates to a low voltage and can provide the linearity and input scope transconductance amplifier, its characteristic is that introduced a new local feedback structure in the traditional source level weaken structure. The feedback structure made two low resistivities anti- pitch points in the source level damping resistance two terminal, the low resistivity anti-pitch point reduced the traditional source level weaken structure distortion. The structure overcame the traditional transconductance amplifier defect of litter input scope under the low voltage, the linear inferior and so on, simultaneously the electric circuit most voltage drop on the key way is smaller than the traditional structure circuit, thus brought out the working potential under the low voltage. The circuit characteristic is that suitable for the low voltage work, the high linearity and the big input scope, the structure completely conforms to the present integrated circuit research and development direction.

Description

technical field [0001] The invention belongs to the design of ultra-large-scale integrated circuits in the field of microelectronics and solid-state electronics, and relates to a novel transconductance amplifier circuit, which can be used for analog signal processing such as analog-to-digital conversion circuits, variable gain amplifiers, and Gm-C filters. circuit design. Background technique [0002] Transconductance amplifier is an important component module of analog circuit, widely used in analog signal processing circuits such as analog-to-digital conversion circuit, variable gain amplifier and Gm-C filter. Recently, transconductance amplifiers have also been used in sampling mixer circuits working at intermediate frequencies or even radio frequencies. In these circuits, the linearity of the entire system is often determined by the transconductance amplifier, so the performance of the transconductance amplifier becomes the key to the performance of the entire system. ...

AI Technical Summary

Problems solved by technology

In the published articles so far, the voltage headroom height across the source decay resistor is generally in the range of V dd -V gs -2V dsat (where V dd is the supply voltage, V gs is the gate-source voltage, V dsat is the saturation voltage, the same below), which severely limits the input amplitude of the source attenuation structure

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