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High-speed linear frequency modulation signal source

A linear frequency modulation signal, frequency modulation signal technology, applied in the direction of electrical components, automatic power control, etc., can solve the problems of low frequency modulation linearity, low working frequency band, low frequency modulation rate, etc., achieve large frequency modulation bandwidth, low cost, and easy production and the effect of debugging

Inactive Publication Date: 2007-07-11
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0003] The purpose of the high-speed linear frequency modulation signal source of the present invention is to provide a kind of frequency modulation signal source that can generate high linearity at high speed, solve the problems of low frequency modulation linearity, low working frequency band, small frequency modulation bandwidth and low frequency modulation rate existing in the existing signal source, and at the same time Facilitate cost reduction and facilitate production and commissioning

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Embodiment Construction

[0023]The specific embodiment of the present invention is illustrated in conjunction with accompanying drawing 1, and the high-speed linear frequency modulation signal source circuit mainly includes a microcontroller 1, a programmable logic control circuit 2, a reference voltage sampling circuit 15, an analog switch 10, a frequency modulation voltage output conversion unit, a reference The frequency generation unit and the interface unit 17 used to connect with other devices, the frequency modulation voltage output conversion unit is mainly composed of a dual-port memory 3, a high-speed D / A converter 16, a second low-pass filter 14, and a variable gain amplifier 13 , the reference frequency generating unit is composed of a high-stable reference frequency source 4, a direct digital frequency synthesizer 5, a digital phase-locked loop 6, a first low-pass filter 7, a frequency divider 8, a first buffer amplifier 9, and a second buffer amplifier 11 Composed of a voltage-controlled ...

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Abstract

A high speed linear FM signal source is the one of broad band generating high linearity, which can realize output of high speed high linearity FM signals having two working states of obtaining reference voltage and high speed FM output, the rate of which is controlled by clock signals or length of sweep digital volume sequence, at the same time, it can be the signal source for free FM property.

Description

1. Technical field [0001] The high-speed linear frequency modulation signal source of the present invention belongs to the field of electronic technology, specifically a signal source capable of generating high linearity frequency modulation signals at high speed, and can be widely used in the fields of electronic measurement, radar, traffic navigation and the like. 2. Technical Background [0002] Broadband chirp signal sources are widely used in electronic measurement, traffic navigation, car collision avoidance, FM radar, compression receivers, radar simulators, electronic warfare and other fields. The main technologies for generating chirp signals include analog technology and digital technology, analog technology The voltage-controlled oscillator is mainly modulated directly by sweeping frequency voltage. Due to the inherent nonlinearity of the VCO, that is, there is a relatively large nonlinear relationship between the output frequency and the modulation voltage, when a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03L7/00
Inventor 阎高伟谢刚谢克明王丽艳
Owner TAIYUAN UNIV OF TECH
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