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Low-voltage self-biased current multiplexing passive mixer

A passive mixer and current multiplexing technology, which is applied in the direction of multi-frequency modulation conversion, etc., to achieve the effect of increasing the load resistance value, high conversion gain, and reducing bias current

Active Publication Date: 2016-12-07
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the semiconductor process size reaches below 40nm, the limited output impedance of the short-channel transistor brings challenges to the precise setting of the bias current.

Method used

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  • Low-voltage self-biased current multiplexing passive mixer
  • Low-voltage self-biased current multiplexing passive mixer

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] like figure 1 Shown is a low-voltage self-biased current-multiplexing passive mixer comprising a self-biased complementary input transconductance stage, a passive local oscillator switch, and a low-voltage transimpedance amplifier, the self-biased complementary input transconductance The stage includes a PMOS transconductor and an NMOS transconductor, and forms a CMOS structure; the PMOS transconductor includes a mirrored PMOS transconductor and a self-biased PMOS transconductor, and the two adopt a capacitive coupling method to jointly provide a radio frequency current to a passive local oscillator switch; The low-voltage transimpedance amplifier includes a common-gate amplifier using a transconductance bootstrap circuit, wherein the transconductance bootstrap circuit includes an NMOS tube common-source amplifier; The impedance amplifier constitutes the curren...

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Abstract

The invention discloses a low-voltage self-biased current multiplexing passive mixer, comprising a self-biased complementary input transconductance stage, a passive local oscillator switch and a low-voltage trans-impedance amplifier, wherein the self-biased complementary input transconductance stage is a CMOS structure, and is used for injecting radio frequency current to the passive local oscillator switch through an NMOS transistor and a PMOS transistor jointly; the low-voltage trans-impedance amplifier is a common-gate amplifier which adopts a transconductance bootstrap circuit, and the transconductance bootstrap circuit adopts a common-source amplifier structure input by the NMOS transistor; and the self-biased complementary input transconductance stage forms current with the low-voltage trans-impedance amplifier for multiplexing through the passive local oscillator switch. According to the low-voltage self-biased current multiplexing passive mixer disclosed by the invention, the power supply voltage and bias current can be simultaneously reduced, relatively high conversion gain can be achieved, the power consumption level of the mixer can be obviously reduced, and characteristics of high conversion gain, stable operation and low overall power consumption can be achieved.

Description

technical field [0001] The invention relates to a low-voltage self-bias current multiplexing passive mixer, which belongs to the technical field of mixers. Background technique [0002] The rapid popularization of handheld wireless devices puts forward higher and higher requirements for the low power consumption design of RF transceiver modules. In the RF receiving system, the mixer is responsible for converting the RF signal to the baseband or intermediate frequency band. It is the core module in the receiving chain. considerable share. The low-power design method and circuit structure for the mixer have always been a research hotspot in the industry, and reducing the power supply voltage and reducing the bias current are the main ways to reduce power consumption. When the semiconductor process size reaches below 40nm, the limited output impedance of the short-channel transistor brings challenges to the precise setting of the bias current. Contents of the invention [...

Claims

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Application Information

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IPC IPC(8): H03D7/16
CPCH03D7/16
Inventor 陈超吴建辉李红
Owner SOUTHEAST UNIV
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