Broadband voltage-controlled active inductor

Abstract

A broadband voltage-controlled active inductor comprises a low-noise transconductance unit (1), a double-branch transconductance unit (2), a first adjustable bias unit (3), a second adjustable bias unit (4) and an adjustable compensation unit (5). The low-noise transconductance unit (1) is connected with the double-branch transconductance unit (2) to form an inductive feedback loop, and low noise is obtained; the first adjustable bias unit (3) and the second adjustable bias unit (4) jointly provide bias current for a feedback loop, and meanwhile, the first adjustable bias unit (3) and the second adjustable bias unit (4), together with two adjustable voltage sources of the adjustable compensation unit (5), realize regulation and control of the performance of the active inductor. Through the division and cooperation of the five units and the four regulation and control ends (Vtune1, Vtune2, Vtune3 and Vtune4) of the five units, the active inductor integrates various performances of high Q peak value and inductance peak value, wide frequency band, independent regulation of the frequency band relative to the inductance peak value, low noise and the like under the same frequency of a high-frequency region.

Description

technical field [0001] The present invention relates to the field of radio frequency device and integrated circuit design, in particular to a device that can simultaneously obtain high Q peak value and inductance peak value at the same frequency in the high frequency region, wide frequency band and the frequency band can be independently adjusted relative to the inductance peak value, and low noise And other excellent performance in one active inductance circuit. Background technique [0002] With the rapid development of wireless technology, radio frequency integrated circuits (RFICs) are developing towards high performance such as small size, high frequency, broadband, and tunability. As one of the basic components of RFICs, the on-chip passive spiral inductor (PSI) has many shortcomings such as low operating frequency, low Q value at high frequency, inductance value, Q value and resonant frequency cannot be adjusted, and A large inductance value means a large area, which...

AI Technical Summary

Problems solved by technology

[0004] At present, although some research progress has been made in the performance of the existing active inductors, the comprehensive performance of the inductance value, Q value, operating frequency band, noise and other parameters is still lacking.

The reason is that in an active inductor, the number of constituent units is not optimized enough, and the effective cooperation between each constituent unit is not enough, so that when one performance parameter is guaranteed to be good, another performance parameter cannot be taken into account.

For example, although some active inductors can obtain the inductance peak value and Q peak value, they often only appear in the low frequency region and cannot be obtained at the same frequency.

Furthermore, the current active inductance cannot keep the peak value of the inductance basically unchanged under different operating frequencies; it cannot keep the peak value of the inductance basically unchanged when the frequency band is adjusted

Moreover, an active inductor often only pays attention to a small number of parameters to achieve improved performance, and cannot provide excellent performance in multiple parameters at the same time.

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