Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

On-chip transformer

An on-chip transformer and main coil technology, applied in transformers, fixed transformers, electric solid devices, etc., can solve the problems of high loss and low coupling coefficient of on-chip transformers, and achieve the effect of reducing loss, uniform induced current and improving performance.

Active Publication Date: 2014-10-15
WUHAN SYNTEK CO LTD
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the above defects or improvement needs of the prior art, the present invention provides an on-chip transformer, which solves the coupling problem of the existing on-chip transformer by splitting the main coil and the secondary coil of the on-chip transformer into multiple parallel primary and secondary coils. The technical problem of low coefficient and high loss, especially suitable for radio frequency integrated circuits

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • On-chip transformer
  • On-chip transformer
  • On-chip transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Such as Figure 2a The shown single-layer on-chip transformer 200, 200 is composed of a primary coil 200a, a secondary coil 200b, a primary coil connector 200c, and a secondary coil connector 200d, wherein the primary coil 200a is composed of two equal-width primary and secondary metal coils 200e and 200f connected in parallel, and the secondary coil 200b It consists of two equal-width secondary metal coils 200g and 200h connected in parallel. The basic dimensions of the single-layer on-chip transformer 200 are as follows: the number of primary (secondary) coils N=1, the ratio of the number of primary and secondary coils is 1:1, the width W of the primary coil and the secondary coil is both 20 μm, the width s of the annular dividing groove is 1 μm, The number of sub-coils n is 2, and the width of the sub-coils is w 1 =w 2 = 9.5 μm. Similar to the on-chip transformer 100, in order to avoid the short circuit of the primary and secondary coils, it is necessary to use th...

Embodiment 2

[0048] Such as Figure 3a The illustrated single-layer on-chip transformer 300, 300 consists of a primary winding 300a, a secondary winding 300b, a primary winding connection 300c, and a secondary winding connection 300d. The basic size of the on-chip transformer 300 is similar to that of Embodiment 1, the difference is that the number of sub-coils is 3, and the width of the sub-coils is w 1 =w 2 =w 3 = 6 μm. Comparison of the simulation results of the on-chip transformer 300 and the same structure of the on-chip transformer 100 designed in the prior art Figure 3b As shown, it can be seen that the coupling coefficient of the on-chip transformer 300 is higher than that of the on-chip transformer 100 within the frequency range of 0.8GHz˜10GHz.

Embodiment 3

[0050] Such as Figure 4a The illustrated single-layer on-chip transformer 400, 400 consists of a primary winding 400a, a secondary winding 400b, a primary winding connection 400c, and a secondary winding connection 400d. The basic size of the on-chip transformer 400 is similar to Embodiment 1, the difference is that the number of primary (secondary) sub-coils is 4, and the width of the primary (secondary) sub-coils is w 1 =w 2 =w 3 =w 4 = 4.25 μm. Comparison of the simulation results of the single-layer on-chip transformer 400 and the on-chip transformer 100 with the same structure designed in the prior art Figure 4b As shown, it can be seen that the coupling coefficient of the single-layer on-chip transformer 400 is higher than that of the on-chip transformer 100 within the frequency range of 1.5 GHz to 10 GHz.

[0051] The above three embodiments are mainly designed from different numbers N of primary (secondary) sub-coils.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses an on-chip transformer which comprises a main coil, a secondary coil, a main coil connector and a secondary coil connector, wherein the main coil is divided into n main sub-coils connected in parallel by (n-1) mutually spaced annular division grooves; the secondary coil is divided into n secondary sub-coils connected in parallel by (n-1) mutually spaced annular division grooves; the width of the ith main sub-coil and the width of the ith secondary sub-coil are same and are wi; and the width of the main coil and the width of the secondary coil are same and are W. The main coil and the secondary coil of the on-chip transformer are divided into the main sub-coils connected in parallel and the secondary sub-coils connected in parallel by the mutually spaced annular division grooves, so that surface areas of the main coil and the secondary coil are reduced, a proximity effect of a surrounding conductor and electromagnetic interference of an environment are reduced, and the performance of the on-chip transformer is improved effectively.

Description

technical field [0001] The present invention relates to the field of integrated circuits, and more particularly relates to a transformer structure on an integrated circuit chip. Background technique [0002] On-chip transformers are widely used in the design of radio frequency integrated circuits (RFICs), such as power amplifiers (PAs), low-noise amplifiers (LNAs), mixers (Mixers), voltage-controlled oscillators (VCOs), etc. On-chip transformers are generally used to realize the transition between single-ended signals and differential signals, and can also be used to realize functions such as broadband matching, signal feedback, and power synthesis, so the performance of the on-chip transformer directly determines the performance of the designed circuit. [0003] Generally speaking, the coupling coefficient k between the primary coil and the secondary coil is one of the main properties of the on-chip transformer. The larger the k value, the tighter the coupling between the p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/02H01F30/06
Inventor 任志雄张科峰刘览琦任达明
Owner WUHAN SYNTEK CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com