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Adjustable on-chip inductor with superhigh Q value

An inductive, ultra-high technology, applied in the direction of inductors, circuits, electrical components, etc., can solve the problem of inductance quality factor deterioration, and achieve the effect of increasing reconfigurability and improving circuit noise.

Active Publication Date: 2015-04-08
NANJING QINHENG MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The MOS tubes used in these two ways are used as switches, resulting in a significant deterioration of the inductance quality factor, so these two methods are rarely used in the design of high-performance RF circuits

Method used

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  • Adjustable on-chip inductor with superhigh Q value
  • Adjustable on-chip inductor with superhigh Q value
  • Adjustable on-chip inductor with superhigh Q value

Examples

Experimental program
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Embodiment Construction

[0032] see image 3 , 4 , there is only electromagnetic coupling between the main inductance L_m and the auxiliary inductance L_couple of the inductance unit, there is no electrical connection, the two ports A and B of the main inductance L_m can be directly connected to the radio frequency circuit, and the function of the auxiliary inductance L_couple is to connect the capacitance control unit And the negative resistance control unit, which converts its load coupling to the main inductance. The two output ports of the capacitance regulation unit are respectively connected to the two ports of the auxiliary inductor. The control port is used to connect the external input control signal Vc1, one end of the variable capacitor C1 is connected to the control port Vc1, the other end is connected to the non-inverting end of the secondary inductor L_couple, one end of the variable capacitor C2 is connected to the control port Vc1, and the other end is connected to the secondary induc...

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PUM

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Abstract

An adjustable on-chip inductor with a superhigh Q value comprises an inductor unit, a capacitance regulating and controlling unit and a negative resistance regulating and controlling unit. The inductor unit is provided with a primary inductor and a secondary inductor with electromagnetically coupled, and two ends of the primary inductor are connected with radio frequency output. The capacitance regulating and controlling unit is provided with two serially connected variable capacitors C1 and C2, the serial connection ends of the variable capacitors C1 and C2 are connected with an external control signal VC1, and the other ends of the variable capacitors C1 and C2 are respectively connected with an in-phase end and an inverse-phase end of the secondary inductor. The negative resistance regulating and controlling unit is provided with five transistors, a grid electrode of the transistor M1 is connected with an externally input control signal VC2, a source electrode of the transistor M1 is earthed, a drain electrode of the transistor M1 is connected together with source electrodes of the transistors M2 and M3, a grid electrode of the transistor M2 is connected together with drain electrodes of the transistors M3 and M5 and a grid electrode of the transistor M4 and the inverse-phase end of the secondary inductor, a grid electrode of the transistor M3 is connected together with drain electrodes of the transistors M2 and M4 and a grid electrode of the transistor M5 and the in-phase end of the secondary inductor, and source electrodes of the transistors M4 and M5 are connected with a power source VDD (voltage drain drain).

Description

technical field [0001] The invention relates to an on-chip inductance, in particular to an ultra-high Q-value on-chip adjustable inductance, which belongs to the technical field of radio frequency circuits. The invention can be effectively applied in the design of radio frequency circuits, and has the effects of increasing the reconfigurability of the circuit, improving the noise of the circuit, improving the frequency selection characteristic of the resonant cavity, reducing the size of the circuit and the like. Background technique [0002] On-chip inductors are widely used in radio frequency circuits, and their functions mainly include series and parallel resonance, filtering and impedance transformation. When the operating frequency of the circuit is low, the corresponding inductance value is very large, the occupied area will be very large, and its ohmic loss and substrate loss are relatively serious, resulting in a very poor quality factor, and the further consequence ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P13/00H01F38/14
Inventor 李智群曹佳
Owner NANJING QINHENG MICROELECTRONICS CO LTD
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