Radio frequency inductance circuit

Abstract

A radio frequency inductance circuit is composed of a first transconductance unit (1), a second transconductance unit (2), a third transconductance unit (3), a frequency band expansion unit (4), a first adjustable bias unit (5) and a second adjustable bias unit (6), wherein the first transconductance unit (1) and the second transconductance unit (2) form a first loop, and the first transconductance unit (1) and the third transconductance unit (3) form a second loop. The first loop and the second loop are connected in parallel, the total conversion capacitance is improved, and the equivalent inductance value of the active inductor is increased. And the transistors in the second loop respectively form a negative resistance network structure and a negative feedback network, so that the Q value and the linearity of the active inductor are increased. And the frequency band expansion unit (4) is connected with the input end of the inductance circuit, so that the working bandwidth of the inductor is expanded. The radio frequency inductance circuit not only has wide frequency band and high linearity, but also has a high Q value and a large inductance value at the same time at any frequencyof a high-frequency region and a high-frequency region, and the Q peak value is tunable.

Description

technical field [0001] The invention relates to the field of radio frequency integrated circuits, in particular to an inductance element that can work at high frequency. Background technique [0002] With the development of microelectronics technology, the development of integrated circuits to small size, high frequency and high performance is an inevitable trend. Radio frequency integrated circuits have to process high-frequency signals with a wide dynamic range, and correspondingly put forward high requirements for the components used, and these components must be able to work at high frequencies. Inductive components are one of them. [0003] In today's radio frequency integrated circuit (RFIC) design, on-chip spiral inductors are widely used. It is composed of metal wires, and its inductance value, quality factor, and material and its own size have an inherent relationship. A large inductance value means a long wire length and a large area. However, long metal wires w...

AI Technical Summary

Problems solved by technology

[0004] At present, although some progress has been made in the research on active inductance circuits synthesized by transistors, due to the close relationship between the performance of active inductance and the circuit topology composed of transistors Related, the unit configuration of the existing active inductance circuit is not optimized enough, the units lack effective coordination, the number of impedance transformations is small, the input capacitance is large, and the parasitic resistance loss is large, resulting in low operating frequency and low Q value at high frequencies. Even without inductance performance, it is difficult to obtain large inductance value and high Q value at high frequency, and it is even more difficult to have large inductance value and high Q value at any frequency in the high frequency region

In addition, when the input signal changes in a wide range, the transconductance value of the transistor will change with the input signal, resulting in a low linearity of the inductance value

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