Totally- integrated low noise power supply system in chip of radio frequency receiver

Abstract

The invention relates to a fully integrated low-noise power supply system for a radio-frequency receiver chip, which relates to the technical field of an integrated circuit of a radio-frequency wireless receiver. The fully integrated low-noise power supply system for the radio-frequency receiver chip comprises a remote voltage regulation end and a local power application end, wherein both outputs of a first low-noise voltage source and a band gap reference voltage source are connected to input ends of a comparator; an output end of the comparator is connected with an input end of a digital calibration module the output of which is fed back to an input of the first low-noise voltage source; the local power application end consists of a plurality of power domains, wherein a low dropout linear regulator consists of a power tube and an error amplifier; the output end of the power tube is connected with a load circuit, and a grid electrode of the power tube is connected with the output end of the error amplifier; and an anode or a cathode of the error amplifier is respectively and correspondingly connected with output ends of a second low-noise power source and the power tube, so as to form a negative feedback system. The fully integrated low-noise power supply system for the radio-frequency receiver chip improves the noiseproof performance, does not require an on chip or off chip capacitor, and obviously improves the system integration.

Description

technical field [0001] The invention relates to a device in the field of power supply technology, in particular to a fully integrated low-noise power supply system in a radio frequency receiver chip. Background technique [0002] In the past ten years, communication technology has developed at an alarming rate, and wireless communication has shown explosive growth, which puts radio frequency technology in a more prominent position. Radio frequency circuits are the key components of transmitters and receivers in communication systems, radar systems and microwave application systems, and are widely used in various fields today, such as: graphic and image transmission, cellular personal communication systems, satellite mobile Communication, wireless local area network, wireless access technology, global satellite positioning system, etc. With the improvement of people's demand for low power consumption and portability of current wireless electronic products such as mobile phon...

AI Technical Summary

Problems solved by technology

[0004] A more general problem is that although the low-dropout linear regulator (LDO) is widely used as the main part of the current on-chip power supply due to its simple structure and easy integration, none of the traditional designs have made special considerations for its output voltage noise. optimization

Most of the optimization methods only use a resistor-capacitor filter network to filter out noise, and this method is mainly limited by the huge area of ​​the on-chip capacitor. Similarly, if a resistor with a larger resistance value is used, the same problem will exist.

Obviously, under the condition that the chip area is constrained, the system is powerless to lower frequency noise

However, if an off-chip capacitor is used, the system integration level will be reduced, so it has great limitations.

[0005] After searching the existing literature, it was found that "A Low Noise, High Power Supply Rejection Low Dropout Regulator for Wirelesssystem-on -Chip Applications" (a low-noise, high-power-supply-rejection-ratio low-dropout linear regulator for wireless SoCs), a method for obtaining low output noise is proposed by adding a preset regulator, and The output of the preset voltage regulator passes through the resistor-capacitor filter network and is used as the reference voltage of the subsequent low-dropout linear regulator. Although this reduces the noise of the output voltage, the capacitor used is as high as 100pF and the resistor is as high as 100M ohms. Requires a large chip area

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