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Linearity correcting device for radar voltage controlled oscillator collecting vehicle information

A technology of vehicle information collection and voltage-controlled oscillation, which is applied to power oscillators, instruments, and power automatic control, can solve problems such as linearity data cannot be achieved, and achieve the effect of improving test accuracy

Active Publication Date: 2008-01-23
安徽蓝盾光电子股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing linearity data cannot meet the ideal requirements and needs to be corrected

Method used

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  • Linearity correcting device for radar voltage controlled oscillator collecting vehicle information
  • Linearity correcting device for radar voltage controlled oscillator collecting vehicle information
  • Linearity correcting device for radar voltage controlled oscillator collecting vehicle information

Examples

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the drawings.

[0039] Figure 2 is a diagram of the clock circuit in the device of the present invention. In the figure, the clock circuit includes the 0SC20.000M chip U7 and the driver HD74HC244 chip U8. The output terminal of the DVDD pin of the digital positive power supply is divided into two branches, one is connected to the capacitor C1 The other is connected to the inductor L1. The output of the inductor L1 is divided into two branches. One is connected to the capacitor C2 and is safely grounded. The other is connected to the pin 4 of the OSC20.000M chip; the pin of the OSC20.000M chip 1 is connected to pin 4 through resistor R1; pin 2 of OSC20.000M chip is safely grounded, pin 3 is connected to pins 4, 6, and 8 of HD74HC244 chip through resistor R2, and pin 1 of HD74HC244 chip is driven Pin 10 and pin 19 are grounded by the DGND digital circuit, and pin 20 is the pin DVDD of the digital positi...

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PUM

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Abstract

The present invention discloses a voltage controlled oscillator linearity correcting device for vehicle information collection radars, which is characterized in that the device comprises a clock circuit, a counter circuit, EPROM correction coefficient table circuit and a DA switching circuit. The present invention firstly utilizes a frequency spectrograph to measure an actual linear curve of the VCO and then carries out function correction after fitting according to measuring results. The correction coefficient table is created through VC programming and then burnt into an EPROM to correct and compensate the whole VCO coefficient, thus achieving correction and improving test precision.

Description

Technical field [0001] The invention relates to a correction device for linearity data of a voltage-controlled oscillator, and a linearity correction device for a voltage-controlled oscillator of a vehicle information acquisition radar. Background technique [0002] In the vehicle information acquisition radar, the linearity of the voltage controlled oscillator (VCO) directly affects the resolution of the test results, and thus the test accuracy. Therefore, in the process of using the voltage-controlled oscillator VCO, the linearity requirements are generally higher. However, the existing linearity data cannot meet the ideal requirements and needs to be corrected. Summary of the invention [0003] The purpose of the present invention is to overcome the shortcomings in the prior art and provide a device for linearity correction of a voltage-controlled oscillator of a vehicle information acquisition radar. [0004] The present invention can be realized through the following techni...

Claims

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Application Information

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IPC IPC(8): H03B1/00H03L7/099G01S7/00
Inventor 钱江罗成刚徐合林
Owner 安徽蓝盾光电子股份有限公司
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