A Wide Tuning Range CMOS Voltage Controlled Oscillator

10-GHz wide tuning-range linear voltage- controlled oscillator

Area Efficient Wide Frequency Range CMOS Voltage Controlled Oscillator For PLL In 0.18μm CMOS Process

Current starved VCO is simple ring oscillator consisting of cascaded inverters. Differential ring oscillator has a differential output to reject common-mode noise, power supply noise and so on. In this paper we have designed and simulated Current Starved VCO and Differential VCO for PLL in Tanner 13.0v 0.18μm digital CMOS process. Performance comparison is done in terms of high oscillation freq...

A Cmos Current Controlled Ring Oscillator with Wide and Linear Tuning Range

A new CMOS current controlled ring oscillator is investigated. It is based on a 3 stage ring oscillator. Each stage uses a simple NMOS for switching a current source to charge a capacitor and discharging it thereby generating a ramp output. Its oscillation frequency depends on the current source. This simple circuit can have a wide tuning range but has some non-linearity problem. A modification...

A lOGHz CMOS Distributed Voltage Controlled Oscillator'

VDD A 10 GHz CMOS distributed voltage controlled oscillator (DVCO) is designed in a 0.35pm BiCMOS process technology using only CMOS transistors. The oscillator achieves a tuning range of 12% (9.3 GHz to 10.5 GHz) and a phase noise of -1 14 dBc/Hz at 1 MHz offset from a carrier frequency of 10.2 GHz. The VCO uses two different simultaneous tuning techniques which allow for a coarse and fine I t...

طراحی و بهبود مشخصه های ساختاری voltage controlled ring oscillator در تکنولوژی cmos

از خصوصیات بارز vco حلقوی می توان به محدوده تنظیم گسترده، طراحی ساده، سطح سیلیکونی کوچک، مجتمع سازی آسان و تلفات توان پایین اشاره کرد. با این حال،نسبت به اسیلاتورهای lc به دلیل ضریب کیفیت پایین، عملکرد نویز فاز اسیلاتورهای حلقوی به طور کلی بسیار ضعیف است، که این یکی از چالش های مهم در طراحی vco حلقوی می باشد. در فصول ابتدایی این پایان نامه سعی بر بررسی ساختارهای مهم و کاربردی vcoهای حلقوی در کن...