In this paper we present a 2μW temperature compensated on-chip digitally controlled oscillator and a 70nW uncompensated, ultra low power oscillator. The temperature compensated oscillator has a temperature stability of 8ppm/C while uncompensated oscillator has a stability of 4%/C. The uncompensated oscillator is calibrated using stable oscillator often to achieve high effective temperature stab...

................................................................................... pg. 04 Chapter 1 – Introduction ................................................................. pg. 04 Chapter 2 – Background ................................................................. pg. 06 Chapter 3 – Voltage Controlled Oscillator ............................................. pg. 08 LC Oscillator ......

Abstract: In this paper, CMOS digitally controlled oscillator (DCO) design is analyzed for 4-16 bits. The CMOS DCO is designed based on a ring oscillator. Simulations of the analyzed DCO using 250nm CMOS technology achieve controllable different frequency range with a wide linearity. A 4-bit digitally controlled CMOS oscillator (DCO) design is best by adjusting the width of p-MOS and n-MOS devi...

In this work we propose a self-adaptive clock based on a ring oscillator as the solution for the increasing uncertainty in the critical path delay. This uncertainty increase forces to add more safety margins to the clock period which produces a circuit performance downgrade. We evaluate three self-adaptive clock systems: free running ring oscillator, infinite impulse response filter controlled ...

A novel VCO topology is proposed that combines the low power of –gm oscillators with the inherent buffering of Colpitts oscillators. Using this topology, a quadrature VCO (QVCO) was implemented in 0.13 μm digital CMOS consuming 32 mW at 20 GHz with just over 10% tuning range. The measured phase noise of the QVCO at 20.17 GHz is -102.41 dBc/Hz at 1 MHz offset. Because the load is isolated from t...

The modern communication technologies require the use of CMOS monolithic oscillators because of their small manufacturing costs and high integration capabilities. The disadvantages of CMOS ring oscillators can be compensated through the use of a VCO architecture. The control voltage of this VCO should compensate for the frequency drift due to process and temperature.

This work develops a broadband quadrature voltage-controlled oscillator (QVCO) for digital video broadcasting (DVB) tuner applications. The QVCO is mainly based on a balanced voltage-controlled oscillator (VCO), which is a combination of two single-ended VCO. Two active ports and two resonant tanks balance the phase of outputs and also increase the operating range. Experimental results show tha...

We may not be able to make you love reading, but vco based quantizers using frequency to digital and time to digital converters 1st edition will lead you to love reading starting from now. Book is the window to open the new world. The world that you want is in the better stage and level. World will always guide you to even the prestige stage of the life. You know, this is some of how reading wi...

This thesis report presents system specification, such as frequency and output power level, and selection topology of an oscillator circuit suitable for a CMOS Integrated Doppler radar application, in order to facilitate short range target detection within 5-15 m range, using a 0.35 μm CMOS process. With this selected CMOS process, the frequency band at 2.45 GHz or 5 GHz, with a maximum output ...