Ultralow consumption current multiplexing mixer based on substrate bias

Abstract

The invention discloses an ultralow consumption current multiplexing mixer based on substrate bias. The mixer comprises the following parts: a transconductance grade consisting of a pair of NMOS (N-channel Metal Oxide Semiconductor) pipes and a pair of PMOS (P-channel Metal Oxide Semiconductor) pipes, a switch grade consisting of two pairs of NMOS pipes, and a load grade consisting of resistors. The transconductance grade of the mixer utilizes a self-bias complementary transconductance structure and forms a folding structure with the switch grade to greatly reduce voltage of a power supply; substrates of all the MOS pipes in a circuit are additionally provided with fixed bias voltage to reduce threshold voltage of the MOS pipe and realize the design of ultralow voltage ultralow power consumption; and through a current multiplexing technique, the noise performance of the circuit is modified, and the conversion gain and the linearity are improved. The ultralow consumption current multiplexing mixer based on the substrate bias, disclosed by the invention, can be applied to deep submicron radio frequency CMOS (Complementary Metal Oxide Semiconductor) integrated circuits and can be widely applied to electronic systems in the aerospace field.

Description

technical field [0001] The invention belongs to the field of deep submicron RF CMOS integrated circuits, and in particular relates to an ultra-low current consumption multiplexing mixer based on substrate bias. Background technique [0002] The RF front-end amplifies, mixes, and converts the signal received by the antenna to complete the conversion from the RF signal to the baseband signal. The mixer is an important part of it, and completes the frequency conversion function of the system. Linearity, conversion gain, noise and power consumption are key performance parameters of the mixer, which directly affect the performance of the entire receiver. These performance parameters affect each other and restrict each other, how to find a compromise has become a difficult point in design in recent years. [0003] At present, wireless communication equipment is developing rapidly towards light weight, small size, low power consumption, and low cost. For portable electronic equipm...

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Problems solved by technology

But in this way, the increase of the switch stage current will increase the noise contribution of the switch stage; the increase of the load stage current will consume the voltage margin and increase the noise contribution of the resistor

[0007] It can be seen that the traditional mixer has contradictions in the design of conversion gain, linearity, noise and voltage margin, and it is difficult to achieve low-voltage and low-power design

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