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Electronic device with trimming voltage controlled oscillator

A technology of voltage-controlled oscillators and electronic devices, which is applied to power oscillators, circuits, electrical components, etc., can solve the problems of voltage-controlled oscillator output frequency deviation, high-frequency characteristic limitation, and phase noise deterioration, etc., and achieve qualified improvement efficiency, improve output quality, and reduce material cost

Inactive Publication Date: 2009-05-13
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the common problems is that in the process of manufacturing voltage-controlled oscillators, often due to material limitations or difficulties in process control, the output frequency deviation or phase noise of the voltage-controlled oscillator will deteriorate during the production process. result
However, since the oscillator has been assembled at this time, how to effectively control the manufacturing yield of the voltage-controlled oscillator becomes a big challenge
[0005] Another common problem is that as electronic devices become more and more compact, the design of the entire circuit board is also required to be integrated. Therefore, how to effectively use every space on the circuit board has become a goal to be pursued
[0006] Moreover, there are now more and more high-frequency products, such as wireless phones or wireless networks, etc., with the current surface mount components, because the electrode terminals are parasitic to high-frequency discontinuous stray effects, so for high-frequency The characteristics of the

Method used

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  • Electronic device with trimming voltage controlled oscillator
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  • Electronic device with trimming voltage controlled oscillator

Examples

Experimental program
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Effect test

no. 1 example

[0058] In this embodiment, the voltage-controlled oscillator mounted on the circuit board of the electronic device is made of an adjustable series microstrip capacitor in the tuning coupling circuit, such as figure 2 The adjustable capacitor 231 is used to adjust the phase noise of the VCO during the manufacturing process.

[0059] Please refer to image 3 , image 3 It is a circuit board structure of a voltage-controlled oscillator 30 . Such as image 3 As shown, the voltage controlled oscillator 30 includes a resonance circuit 31 , a coupling circuit 33 and an oscillation circuit 35 . The circuit structure of resonant circuit 31, coupling circuit 33 and oscillating circuit 35 can refer to figure 2 The schematic diagram of the circuit is shown.

[0060] First, a plurality of microstrips are formed by patterning the first conductive layer 32 . These microstrips are conductive and are used to connect the circuit components of the resonant circuit 31 , the coupling circu...

no. 2 example

[0068] In this embodiment, the voltage-controlled oscillator mounted on the circuit board of the electronic device is made by adjusting the adjustable parallel microstrip capacitor in the resonant circuit, such as figure 2 The adjustable microstrip capacitor 211 is used to adjust the output frequency of the voltage-controlled oscillator during the manufacturing process.

[0069] Please refer to Figure 6A , which shows a circuit board structure and circuit of a voltage-controlled oscillator 40 . The VCO 40 includes three parts: a resonant circuit, a coupling circuit and an oscillating circuit. For the circuit structure of resonant circuit, coupling circuit and oscillation circuit, please refer to figure 2 The schematic diagram of the circuit is shown.

[0070] In this embodiment its circuit structure is as follows. First, the first conductive layer 42 is patterned to form a plurality of microstrips. These microstrips are electrically conductive and are used to connect c...

no. 3 example

[0079] In addition to the above-mentioned two embodiments where the adjustable microstrip capacitors are arranged on the coupling circuit and the resonant circuit respectively, another embodiment is to arrange the adjustable microstrip capacitors on the coupling circuit and the resonant circuit at the same time.

[0080] That is to say, the third embodiment is a combination of the first embodiment and the second embodiment. Please refer to Figure 8A , this figure shows a circuit board combining the first embodiment and the second embodiment. On this circuit board, there are adjustable microstrip capacitors 211 and 231 composed of microstrips, respectively arranged in the coupling circuit and the resonant circuit of the voltage controlled oscillator. Wherein, the adjustable microstrip capacitor 211 can be cut at different positions to provide different coupling capacitances to obtain the lowest phase noise. As for the adjustable microstrip capacitor 231, it can be cut in the...

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Abstract

A voltage controlled oscillator on circuit board that can adjust phase noises and frequency output range. It comprises resonant circuit, coupled circuit and oscillating circuit. The coupled circuit and resonant circuit each have tunable microstrip capacitor. Makes patterning for two conducting layer on the circuit board to form the lapped microstrip and places an insulation layer between the two conducting layer to build the tunable microstrip capacitor, then uses laser cutting the tunable microstrip capacitor from different direction to change its capacitance and make the capacitor presenting inductive character, and further to reach the purpose fine tuning the output frequency of the voltage controlled oscillator and phase noses.

Description

technical field [0001] The present invention relates to a voltage controlled oscillator, and more particularly to an electronic device having a voltage controlled oscillator capable of fine-tuning the output frequency range during the manufacturing process. Background technique [0002] Regardless of whether it is an analog circuit or a digital circuit, oscillators are widely used in today's circuit design to realize various signal processing or communication functions. A voltage-controlled oscillator (Voltage Control Oscillator) is an important component used to generate an oscillating signal. The working principle of the voltage-controlled oscillator is that it can output different oscillation frequencies by inputting different reference voltages. [0003] Although the development of voltage-controlled oscillators has a long history, with the continuous improvement of the quality requirements of modern electronic equipment for oscillators, the design of voltage-controlled...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03B5/12H03H7/01H01L27/00H01L27/01H01L27/02
Inventor 史承彦
Owner DELTA ELECTRONICS INC
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