A Broadband Adjustable Passive Network

A passive network and adjustable technology, applied in the direction of impedance network, multi-terminal pair network, electrical components, etc., can solve the problems of power consumption and nonlinearity, complex structure, and difficult performance, so as to reduce the number of inductors and reduce the occupation Effect of chip area and precise adjustment of impedance value

Active Publication Date: 2021-09-07
RDA MICROELECTRONICS SHANGHAICO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Although the use of active devices in integrated circuits to simulate inductors has advantages such as small footprints, there are also disadvantages such as complex structures, power consumption and nonlinearity, and performance that is difficult to meet the needs of various electronic devices.

Method used

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  • A Broadband Adjustable Passive Network
  • A Broadband Adjustable Passive Network
  • A Broadband Adjustable Passive Network

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Embodiment Construction

[0038] Since the on-chip spiral inductor occupies a large area, if a large number of inductors are used in the passive network, a large chip area will be required. So when designing an adjustable passive network, it is necessary to reduce the amount of inductance as much as possible. However, when the number of inductors is small, it is difficult to precisely adjust the impedance of the entire network by using a common switching method.

[0039] In order to solve the contradiction between requiring as few inductances as possible and precisely adjusting the impedance, the present application provides the first embodiment of the adjustable passive network, such as Figure 4 shown. The adjustable passive network is formed by one branch or multiple branches connected in parallel, and each branch is connected in series by an inductor Ln and an adjustable resistor VRn. Each inductor Ln can be realized by an independent inductor, for example, an on-chip spiral inductor. Each adjus...

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Abstract

The application discloses a broadband adjustable passive network, which is formed by a branch or a plurality of branches connected in parallel; each branch is connected in series by an inductor and an adjustable resistance. Further, when the resistance value of the adjustable resistor is adjusted, the resistance and / or inductance of the entire passive network are adjusted. In this application, all passive devices are used to realize an impedance network that can precisely adjust the impedance value and has a wide adjustment range. Due to the wide range of adjustable impedance values, the required impedance can be realized in a wide frequency range, that is, the impedance requirement of broadband can be met. Not only the impedance value of the whole passive network can be adjusted, but also the Q value can be adjusted. The entire passive network minimizes the number of inductors, thereby reducing the chip area occupied.

Description

technical field [0001] The present application relates to a passive network (also called impedance network), in particular to a passive network with adjustable impedance value. Background technique [0002] In the field of radio frequency signal processing, especially in circuits such as radio frequency signal generation, amplification, modulation, etc., it is necessary to use a passive network (passive network). A passive network refers to a circuit that does not contain active devices, and is mainly composed of passive devices such as resistors, capacitors, and inductors. An adjustable passive network means that some or all of the component impedance values ​​can be adjusted, so that the impedance value of the entire passive network can be adjusted. In radio frequency circuits, passive networks can be used to implement functions such as filtering, resonance, as a load, impedance matching and transformation, and a typical application is a matching network. [0003] Adjust...

Claims

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Application Information

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IPC IPC(8): H03H7/38
CPCH03H7/38
Inventor 孙亚楠江亮张海兵林甲富贾斌
Owner RDA MICROELECTRONICS SHANGHAICO LTD
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