Dual-mode injection locking frequency divider with low power consumption and wide locking range

Abstract

The invention discloses a dual-mode injection locking frequency divider with low power consumption and wide locking range, comprising a negative resistance unit, an injection unit, a resonance unit and a switched capacitor array unit, which are all connected in parallel with each other. The invention realizes the low power consumption performance by reducing the power supply voltage and reducing the half conduction current though setting the negative resistance unit adopting the current multiplexing structure and the substrate bias technology, and avoids compromises in circuit parameters due to the locking range versus power consumption and quality factor since the switching signal controls the capacitance of the capacitor array to achieve a wide range by designing the switched capacitor array unit, without significantly increasing power consumption. The dual-mode frequency division is achieved by setting the injection unit of the double-tube direct injection method, and the specific offset design of the injection tube reduces the influence of the injection power on the wide range, thereby achieving the advantages maintaining of the wide locking range at a lower injection power.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to an injection-locked frequency divider with dual-mode low power consumption and wide locking range. Background technique [0002] With the development of science and technology, various electronic devices have higher and higher requirements on the performance of integrated circuits. Especially with the advent of the 5G communication era, RF transceivers used in wireless communication systems must have the ability to work with low power consumption and low phase noise in the ultra-high frequency band. The frequency synthesizer that generates the local oscillator signal is the key module of the RF transceiver, and the prescaler is the highest frequency band in the frequency synthesizer. Therefore, the high frequency performance of the prescaler is very important to the entire system. [0003] Currently, injection-locked dividers are the best choice for prescaler designs. Injecti...

AI Technical Summary

Problems solved by technology

However, injection locking technology has the disadvantage of a narrow locking range, which usually requires a compromise design in terms of injection power, circuit quality factor, etc., or additional structures such as harmonic enhancement units to expand the locking range. power consumption and area

Moreover, the traditional injection-locked frequency divider often needs to adjust the circuit in the conversion of the frequency division coefficient, and cannot achieve flexible coefficient conversion on the same circuit

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