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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: 2009-11-25
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 the heat generated by other circuit components (eg, integrated circuits) on the ground plane of the circuit board from dissipating to the reference clock source to protect the reference clock source (eg, oscillators) are not affected by this heat. A more detailed description will be given below.

[0022] Please also refer to figure 1 as well as figure 2 . figure 1 A top view of the ground plane layout and circuit components of the circuit structure 100 designed for the module of the present invention. figure 2 for along figure 1 A cross-sectional view of line 1-1' of circuit structure 100 is shown. Such as figure 1 as well as figure 2 As shown, the circuit structure 100 includes a circuit board 120 and a module of a plurality of circuit components 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: ...

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Abstract

The invention provides a circuit structure, which comprises: a circuit board, a first circuit element mounted on the circuit board, and a second circuit element mounted on the circuit board. The 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, wherein the circuit board has no electrical connection between the first ground plane layout and the second ground plane. The first circuit element is electrically connected to the first ground plane layout, and the second circuit element is electrically connected to the second ground plane layout. The circuit structure provided by the present invention prevents the heat generated by other circuit components on the ground plane of the circuit board from spreading to the reference clock source by completely cutting off the heat conduction path established by the common ground plane, thereby reducing the impact of heat generated by other circuit components on the reference clock source. The influence caused by the reference clock source can minimize the frequency drift of the reference clock source.

Description

technical field [0001] The present invention relates to circuit board design, and more particularly to a circuit structure with an independent ground plane layout applied on a circuit board. Background technique [0002] The circuit structures with independent ground plane layouts can be used in circuit components such as global positioning system (GPS) chips and temperature compensation crystal oscillators (TCXO) respectively. [0003] Generally, circuit components are mounted on a circuit board (eg, a printed circuit board) and interconnected by conductive paths on the circuit board. Taking the global navigation satellite system (hereinafter referred to as GNSS) as an example, such as GPS, the GPS receiver includes a GPS chip and an oscillator (for example, a temperature compensated crystal oscillator), and the GPS chip is used to process radio frequency signals and base The frequency signal is used to calculate the positioning information, and the oscillator is used as a...

Claims

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Application Information

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