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Circuit structure

A technology of circuit structure and circuit board, which is applied in the direction of printed circuit, printed circuit, circuit device, etc., can solve the problem that the reference oscillation signal cannot be effectively and stably output, and achieve the effect of small frequency drift and reduced influence

Inactive Publication Date: 2008-07-23
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inherent nonlinear compensation characteristics of the compensation circuit of the temperature-compensated crystal oscillator, the compensation circuit of the temperature-compensated crystal oscillator cannot effectively stabilize the output reference oscillation signal under small temperature changes

Method used

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Embodiment Construction

[0021] The present invention discloses a new and low-cost solution to prevent heat generated by other circuit elements (for example, integrated circuits) on the ground plane of the circuit board from spreading to the reference clock source, so as to protect the reference clock source (for example, The oscillator) is not affected by these heat. A more detailed description will be given below.

[0022] Please refer to Figure 1 and Figure 2 at the same time. FIG. 1 is a top view of the ground plane layout of the circuit structure 100 of the module design of the present invention and the circuit components. Fig. 2 is a cross-sectional view taken along line 1-1' of the circuit structure 100 shown in Fig. 1. As shown in FIGS. 1 and 2, the circuit structure 100 includes a circuit board 120 and a module of a plurality of circuit elements mounted on the circuit board 120. For ease of example, the circuit components mounted on the circuit board 120 include but are not limited to: a signal p...

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PUM

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Abstract

A circuit structure includes a circuit board, a first circuit component mounted on the circuit board, and a second circuit component mounted on the circuit board. The first circuit board has a first ground plane layout including at least one ground plane, and a second ground plane layout including at least one ground plane, where the first ground plane layout is not electrically connected to the second ground plane layout within the circuit board. The first circuit component is electrically connected to the first ground plane layout, and the second circuit component is electrically connected to the second ground plane layout. The circuit structire of the invention can prevent heat caused by other circuit units of ground plane of the circuit board diffuse to the reference clock source by completely stopping heat exchange path established by common ground plane, thus the circuit structure reduces impact of the heat reference source caused by other circuit unit, and making frequency departure of the reference clock source minimize.

Description

Technical field [0001] The present invention relates to circuit board design, in particular to a circuit structure with independent ground plane layout applied to the circuit board. Background technique [0002] Circuit structures with independent ground plane layouts can be used in circuit elements such as global positioning system (GPS) chips and temperature compensation crystal oscillators (TCXO). [0003] Generally, circuit elements are mounted on a circuit board (for example, a printed circuit board) and interconnected through conductive paths on the circuit board. Take the global navigation satellite system (GNSS for short) as an example, such as GPS. The GPS receiver includes a GPS chip and an oscillator (for example, a temperature-compensated crystal oscillator). The GPS chip is used to process radio frequency signals and base Frequency signal is used to calculate the positioning information, and the oscillator is used as a reference clock source for high frequency accura...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K1/02
CPCH05K2201/09972H05K1/0201H05K1/0243H05K1/0237H05K2201/062H05K2201/09663H05K2201/093H05K1/0298H05K2203/304
Inventor 欧阳正一
Owner MEDIATEK INC
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