Design Of 8～16GHz Voltage-Controlled Oscillator For The Ultra-Wideband Millimeter Wave Frequency Source

As an important means of transmitting information,radio frequency technology has been widely used in civil,military and industrial fields,further accelerating the speed of information exchange and significantly reducing the cost of data transmission.The rise of smart devices puts forward more size and performance demanding for reliable communication.Miniaturized,highly integrated,highperformance,and highly reliable RF transceiver chips have always been one of the key and difficult points in the design of RF systems.As a key module in the frequency source,Voltage-Controlled Oscillator(VCO)not only determines the output frequency signal of the frequency source,but also directly affects the performance of the RF transceiver.Therefore,the research and design of the highperformance,the study of high-stability VCO is important for modern radio frequency systems.In this thesis,an 8-16 GHz voltage-controlled oscillator for ultra-broadband microwave frequency sources is designed in 0.13μm Si Ge Bi CMOS process.The VCO adopts the C-type oscillator structure which reduces the conduction angle of the oscillator tube,significantly increasing the current utilization efficiency to obtain a larger oscillation amplitude under the same bias,and optimizes the impulse sensitivity function(ISF)for better phase noise performance.An additional common-mode resonance point for the common-mode path are also provided,which improves the quality factor of the resonator and further reduces the phase noise.An implicit common-mode resonance technique that reduces the use of inductors is applied.The switched capacitor array is controlled by binary code,extending the tuning range while allowing fine tuning.Two VCOs,which cover 8～12 GHz and 12～16 GHz respectively are used,with a two-to-one selector in the output stage to select the VCO output of the desired frequency band as required for output.The field-circuit co-simulation results show that at 25℃,TT process,and 3.3V power supply voltage,the VCO covers frequencies from 7.95 GHz to 16.62 GHz,and the phase noise is less than-85.76 d Bc/Hz at 100 k Hz frequency offset,and is less than-105.92 d Bc/Hz 1MHz frequency offset.The voltage control gain is less than 0.26GHz/V,and the output power is greater than-0.29 d Bm.The maximum power consumption of this system is 41.78 m W.The performance of the VCO designed in this thesis meets the design index requirements,and can be applied to ultra-wideband frequency source system.