Mixer circuit and radio frequency tag circuit applied to remote control system

Abstract

The invention relates to the technical field of circuit design, and discloses a mixer circuit and a radio frequency tag circuit applied to a remote control system, which comprises an input transconductance stage module, a switch stage module, a current injection module and an output load module, the mixer circuit is configured to realize mixing conversion of a radio frequency signal and a local oscillation signal into a low-noise intermediate frequency signal for further processing by adopting a current injection technology and a self-bias current multiplexing structure through the input transconductance stage module, the startup and shutdown module, the current injection module and the output load module; according to the circuit, the power consumption of the whole circuit can be reduced,the conversion gain is improved, and the noise coefficient is reduced by using good port-to-port isolation.

Description

technical field [0001] The invention relates to the technical field of circuit design, in particular to a mixer circuit and a radio frequency tag circuit applied to a remote control system. Background technique [0002] In recent years, the growing demand for wireless devices has led to the rapid development of radio frequency integrated circuits, making wireless communication one of the fastest growing markets. MOS, full name Complementary Metal Oxide Semiconductor, is a large-scale application Raw materials for the manufacture of integrated circuit chips. Using CMOS technology, pairs of metal-oxide-semiconductor field-effect transistors (MOSFETs) can be integrated on a silicon chip. This technology is usually used in the production of RAM and switching application systems. In the computer field, it usually refers to the ROM chip that saves the basic startup information of the computer (such as date, time, startup settings, etc.). CMOS is composed of PMOS tube and NMOS tu...

AI Technical Summary

Problems solved by technology

Passive mixers have good linearity, but cannot provide gain. Therefore, the applications of passive mixers are greatly limited

The active mixer can provide a certain gain, which is beneficial to the noise performance of the whole machine, and is widely used, but the power consumption of the active mixer is an inevitable problem. Usually, the mixer is subject to a higher power supply voltage so that Ultra-low power consumption is difficult to achieve

[0005] In the prior art, the linearity of the active mixer shows a good linear relationship between the output small signal current and the input RF signal when the amplitude of the input RF signal is small, but as the amplitude of the RF signal increases, resulting in The output small-signal current no longer changes linearly with the RF signal, so the linearity becomes worse

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