Ultralow-power-consumptionvoltage-controlled oscillator based on feedback of high-Q-value transformer

Abstract

The invention belongs to the technical field of wireless communication, and provides an ultralow-power-consumption voltage-controlled oscillator based on high-Q-value transformer feedback, which is used for overcoming the problems that the existing voltage-controlled oscillator based on a transformer feedback mode is high in power consumption, flicker noise and phase noise performances need to be improved and the like. On the basis of a traditional transformer feedback voltage-controlled oscillator structure, firstly, a high-Q-value transformer of a patterned shielding plate technology is adopted, and the phase noise performance of the overall structure of the voltage-controlled oscillator is effectively improved; secondly, an extra direct-current bias structure composed of a capacitor Cac and a resistor Rg is introduced between the primary coil of the transformer and the transistor, so that the power supply voltage of the whole structure can be lower than the threshold voltage of the cross-coupled transistor, and the power consumption is further reduced; and finally, through a flicker noise suppression technology that a resistor Rd is connected in series to the drain electrode of the transistor, a flicker noise component is effectively suppressed, and the phase noise performance of the overall structure of the voltage-controlled oscillator is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to a voltage-controlled oscillator (Voltage Controlled Oscillator, VCO for short) as a core module in a frequency source, and specifically provides an ultra-low power consumption voltage-controlled oscillator based on high-Q transformer feedback. Background technique [0002] With the vigorous development of communication technology, especially the continuous emergence of technologies such as automotive radar, 5G communication, and the Internet of Things in recent years, the performance requirements for frequency sources are also getting higher and higher. As the core module of the frequency source, the performance of the voltage-controlled oscillator (VCO) largely determines the quality of the frequency source. Therefore, the design of a high-performance VCO is particularly critical; This poses a challenge to the method of improving the phase noise performance of the tradi...

AI Technical Summary

Problems solved by technology

[0008]The purpose of the present invention is to solve the problems of high power consumption, flicker noise and phase noise performance of the existing voltage-controlled oscillator based on the transformer feedback method. , providing an ultra-low power voltage-controlled oscillator based on high-Q transformer feedback

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