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LC-tank oscillator and clock outputting method

A technology of inductance, capacitance and clock output, which is used in power oscillators, electrical components, adjustment of resonant circuits, etc.

Active Publication Date: 2013-02-13
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to provide higher tuning resolution and larger adjustment range when adjusting the frequency, the known technology requires a large number of tuning circuit components to adjust the frequency

Method used

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  • LC-tank oscillator and clock outputting method
  • LC-tank oscillator and clock outputting method
  • LC-tank oscillator and clock outputting method

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Embodiment Construction

[0039] In the present invention, several specific and detailed examples are disclosed, such as electronic circuits, components and methods, so that readers can fully understand the embodiments of the entire invention. Although the present invention has been described above with the embodiments, the scope of the present invention is not limited thereto. As long as it does not depart from the gist of the present invention, the industry can carry out various deformations or changes, and these changes all should fall into the claims of the present invention within the scope of the book.

[0040] Embodiments of the present invention provide a technique for easily setting a tuning circuit in a digitally controlled LC-tank oscillating circuit. figure 1 It shows a digitally controlled LC-tank oscillating circuit 100 and its control logic circuit according to an embodiment of the present invention, wherein the digitally controlled LC-tank oscillating circuit 100 and its control logic c...

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Abstract

A digitally controlled LC-tank oscillator is constructed by connecting different tuning circuits to a LC tank. The tuning circuit includes a single bank of tuning cells, a dual bank of tuning cells, or a fractional tuning circuit. Each of said tuning cells in the tuning circuit includes a tuning circuit element and a memory cell.

Description

technical field [0001] The invention relates to an electronic circuit, in particular to (but not limited to) a digitally controlled oscillation device and circuit components of a single crystal integrated circuit partial circuit. Background technique [0002] In digitally controlled oscillators, the adjustment of the operating frequency is accomplished by enabling (Enabling) or disabling (Disabling) many tuning circuit components. These tuned circuit elements can be any components and circuits, such as transistors or variable capacitors. However, in order to provide higher tuning resolution and larger tuning range when adjusting the frequency, the known technology requires a large number of tuning circuit components to adjust the frequency. [0003] The more tuned circuit elements are required to cover the same adjustment range and the better the resolution of the tuned circuit elements under voltage and temperature variations. Furthermore, in order to reduce the area cost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03B5/04H03B5/20
CPCH03J1/00H03L7/099H03J2200/10
Inventor 谢鸿元李朝政
Owner REALTEK SEMICON CORP