高频压控振荡器外文翻译
13页1、压控高频 LC 振荡器的设计 1Voltage control design of high frequency LC oscillatorsStudent : Pxxx, physics and information engineering collegesInstructor : xxx, Jianghan UniversityIn recent years,with the rapid development of wireless communication technology, make the market for rf integrated circuit has had a huge demand. In the rf circuit, the voltage control oscillation (VCO) occupied a very important position.With a wide range of applications.In the early stages of the radio technology development,it i
2、s used to produce high-frequency in transmitter carrier voltage,As a specialized superheterodyne receivers in the machine oscillator, be sending and receiving equipment basic components.Now the use of oscillator is more and more widely.For example: in radio communication, radio, and television equipment used to produce the need of the carrier and the machine oscillation signal;In the electronic measuring instruments used to produce all sorts of frequency sine signals, etc.DefinitionOscillator is
3、 simply stated a frequency source, usually in a phase lock loop.Detailed said is that a device dont need the signal to their own motivation, Dc power can be transformed into Ac power .Generally fall into the positive feedback and negative resistance.The so-called “oscillating“,Its meaning is to allude to exchange,.Oscillator includes a never oscillation to process and function of oscillation.Can completion from dc to ac power transformation,This device can be called “oscillator“.Oscillator worki
4、ng principleLC circuit consisting of capacitors and inductors, electric field and the conversion of magnetic energy production process free oscillation. To maintain the oscillation also has a positive feedback amplifier circuit, the LC oscillator is divided into a transformer coupled and three-point oscillator, many applications of quartz crystal quartz crystal oscillator, LC oscillator with an integrated operational amplifier. Exactly the same device can not be parameters in the state of the po
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