【導(dǎo)讀】頻率的電子振蕩電路,是現(xiàn)代無線電通信系統(tǒng)的重要組成部分課題。在當今集成電路向尺。環(huán)形振蕩器易于集成，可調(diào)頻率范。圍大，但相位噪聲不如性能不如LC振蕩器。LC壓控振蕩器要求高品質(zhì)因素的無源器。件，需要片上電感和變?nèi)莨芷骷拍芗杉?。角色，具有廣泛的用途。電壓，在超外差接收機中用作本機振蕩器，成為發(fā)射和接收設(shè)備的基本部件。子手表中采用頻率穩(wěn)定度很高的振蕩電路作為定時部件等。電子管VCO的振蕩頻率是通過改變振蕩電路中電感器或電容器的參數(shù)值來?；?，用變?nèi)荻O管作壓控器件，改變其控制電壓就可實現(xiàn)VCO振蕩頻率的調(diào)節(jié)。晶體管、變?nèi)荻O管和其他無源元件就構(gòu)成了分立式的晶體管VCO。實現(xiàn)了振蕩頻率的電子調(diào)諧，這是變?nèi)荻O管對VCO發(fā)展的重大貢獻。此外，分立元件VCO. 目前，VCO組件達到了新的水平，其體積已減小到4mm×5mm×2mm，大批量供貨VCO. 目前，單片集成VCO還不能用于對相位噪聲要求很高的應(yīng)用領(lǐng)域。

　　

【正文】 dopt a new miniature ponents and more advanced thin film technology and surface mount technology, continue to promote the VCO package miniaturization and mounted on the surface of. The pass transistor oscillation circuit improvement and development, solve good miniaturization brings resonator Q reduces problems and low power consumption caused by deterioration of a problem. Fourth generation mobile phones and other work in the microwave band highend wireless systems need to further improve the working frequency of the VCO ponent, VCO ponent high frequency. Development of frequency higher microwave VCO ponents are very important research topic in the future. SiGe BiCMOS RF IC basic technology is evolving with progress. Semiconductor manufacturing technology of active devices and passive ponents will have better performance. Now, using the Si technology, also can be used for more than 50GHZ transistors and high Q value, high capacitance ratio, low series resistance and capacitance diode quality. This technology also has a substrate of low loss, metal layer thickness of parasitic element, device is little, high working frequency, small working current monolithic integrated VCO. Modern wireless systems, especially in modern mobile munication system, not only requires the VCO its miniaturization and low cost, but also hope that VCO with frequency synthesizer and transceiver unit circuits are monolithically integrated, so as to reduce the volume and cost of the. In addition, monolithic integrated VCO design theory also is being deepened, more and more advanced design technology. Differential amplifier, amplitude control, two harmonic suppressor, IC coupling transformer, posite oscillator, high frequency structure design technology are being incorporated into the monolithic integrated VCO design. Using monolithic integrated VCO technology to highquality VCO transceiver circuit integrated together with the new products continue to e out. For example, in WLAN and Bluetooth device, the new transceiver is made of high quality VCO and RF 黃河科技學(xué)院畢業(yè)設(shè)計（ 文獻翻譯 ） 第 13 頁 transceiver frontend IC integrated together, so that its size is greatly reduced. WLAN ( type and 5GHZ type ) called VCO has very low phase noise. Because RF IC VCO technology unceasing development, satellite receiver, CATV settop box, wireless data device, cordless phones, mobile phones and other mercial RF systems and devices are increasingly used integrated frequency source. Obviously, in largescale mercial application, monolithic integrated VCO market share will continue to increase, and the discrete ponent VCO and VCO ponents of market share will be reduced stage by stage. Monolithic integrated VCO in largescale mercial wireless system is dominated by the time will soon e. VCO technology has realized from the heavy electric tube VCO circuit to the area less than 1square mm Si IC span. VCO is the key device of frequency source, has been widely used in various electronic systems. The performance of VCO has a decisive effect on electronic system. In modern mobile munication system to promote the development of VCO high frequency, to form a new generation of microwave VCO. The VCO ponents and VCO microwave monolithic integrated VCO is a main structural form, is currently the mainstream product of wireless system. Although, in the overall performance levels, monolithic integrated VCO is inferior to VCO ponent, but it has the integrated advantage, VCO still is the developing direction in the future [5]. In the RF IC technology, SiGe BiCMOS technology is a monolithic integrated VCO the most promising manufacturing technology. From: ISO/IEC JTC1/SC29/WG1 (ITUSG8) N2058, JPEG2021 is now an International Standard, 9 March 2021.