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High-resolution digitally controlled tuning circuit elements

A technology of digital control, circuit components, applied in the field of tuning circuits, which can solve problems such as accuracy limitations

Active Publication Date: 2009-07-22
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the minimum line width that can be achieved by current process technology is usually limited by the precision of etching and lithographic processes.

Method used

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  • High-resolution digitally controlled tuning circuit elements
  • High-resolution digitally controlled tuning circuit elements
  • High-resolution digitally controlled tuning circuit elements

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Embodiment Construction

[0035] The multiple embodiments of the present invention illustrated in the specification are all preferred embodiments of the present invention, and the purpose is to illustrate that the present invention can be implemented in many ways and not to limit the scope of the present invention. In other words, those skilled in the art can know the details of the present invention through the description of these embodiments, so details are not repeated here.

[0036] Embodiments of the present invention show the advantage of being able to implement high resolution tuned circuit element density on an integrated circuit. Please refer to " figure 1 "," figure 1 ” is a schematic diagram of functional blocks of an embodiment of the integrated circuit 100 of the present invention. The integrated circuit 100 includes a tuning circuit 110, and the tuning circuit 110 includes circuit components for frequency tuning, such as a digitally controlled oscillator. The tuning circuit component ...

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Abstract

A high-resolution digitally controlled tuning circuit elements used as tuning circuit elements in a tuning circuit, including a plurality of sub-elements. The sub-elements generate circuit valves depending on logical valves of digital control input signals. The tuning circuit element may be implemented with varactors, current sources, and other components for circuits. Furthermore, The tuning circuit element is provided with high-resolution that is not necessarily limited by minimum feature size of a given fabrication process technology.

Description

technical field [0001] The invention relates to a tuning circuit, in particular to a digital tuning circuit on an integrated circuit. Background technique [0002] Digital tuning circuits are widely used in data and voice communication applications. Due to many considerations, such as portability, reliability, cost, etc., digital tuning circuits are one of the more preferred components in monolithic integrated circuits. The digital tuning circuit contains many tuning components, such as: capacitors, inductors and some circuit components that can be used to adjust the frequency. The number of special circuit elements that a monolithic integrated circuit can have is determined by the minimum feature size that can be achieved by the process technology, such as: CMOS and BIPOLAR. However, the minimum line width that can be achieved by the current process technology is usually limited by the precision of etching and lithographic processes. When a circuit element is used as a d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03J5/14
CPCH03J3/185H03J3/20
Inventor 谢鸿元
Owner REALTEK SEMICON CORP
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