A Study of VCO & PLL Based on Active Load Differential Amplifiers

• Main Authors: Chia-Hsiang Chang, 張家祥
• Other Authors: Cher-Shiung Tsai
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/59760195659586913021

碩士 === 崑山科技大學 === 電子工程研究所 === 98 === In this thesis, we use the differential amplifier with high input impedance, high output impedance and high voltage gain characteristics, to implement a differential amplifier voltage controlled oscillator ( VCO ),and can be applied on PLL circuit design. The differential amplifier voltage controlled oscillator ( VCO ) base on the framework of differential amplifier, to design CMOS and BiCMOS differential amplifier voltage controlled oscillators. In the Phase-Locked Loop ( PLL ) circuit takes active load differential amplifier oscillator as main core to design CMOS active load differential amplifier oscillator. This circuit is simulated and verified by Advanced Design System (ADS), with tsmc 0.35-μm BiCMOS technology for the differential amplifier Ring VCO, and tsmc 0.18-μm CMOS technology for the active load PLL. Key performance：the VCO has a wide operating frequency range, from 399 MHz to 4134 MHz with 0.7 V to 1.8 V supply voltage, The PLL lock frequency is 2880 MHz, and lock time is under 4 μs, and total power consumption is 7.398 mW and the output power is 10.707 dBm. The complete PLL including its on-chip loop filter occupies 623×623 μm2.