A digitally controlled oscillator or DCO is used in synthesizers, microcontrollers, and software-defined radios. The name is analogous with "voltage-controlled oscillator". DCOs were designed to overcome the tuning stability limitations of early VCO designs.

2002年8月6日 · A monolithic integrated digitally controlled oscillator circuit is discussed. The oscillator has an output frequency range from 19.07 Hz to more than 20 MHz with a resolution of 19.07 Hz. It is fully linear over the complete control range with respect to the digital control word, has the long-term stability of a quartz oscillator, and the ...

2021年2月16日 · This paper presents a digitally controlled oscillator (DCO) with a low-complexity circuit structure that combines multiple delay circuits to achieve a high timing resolution and wide output frequency range simultaneously while also significantly reducing the …

Abstract— A novel digitally controlled oscillator (DCO)-based architecture for frequency synthesis in wireless RF applications is proposed and demonstrated. It deliberately avoids any use of an analog tuning voltage control line. Fine frequency resolution is …

2015年1月1日 · In this paper a 14-bit digitally controlled oscillator (DCO) with operating frequency up to 4.2 GHz in 0.18 mum complementary metal oxide semiconductor (CMOS) technology is presented.

The Voltage Controlled Oscillator is replaced by Digitally Controlled Oscillator in the digital Phase Locked Loop systems. The Digitally Controlled Oscillator has several differences and limitations which require further study in order to compare the different circuit variations and to choose the most appropriate circuit for the application.

Abstract— In this paper, a new differential delay cell has been proposed and 16-bit Digital Controlled Oscillator is designed. The 16 bit DCO consist of 4-stage of differential delay cell in ring string and a digital control scheme is used to improved noise characteristics.

2003年11月17日 · Abstract: A novel digitally controlled oscillator (DCO)-based architecture for frequency synthesis in wireless RF applications is proposed and demonstrated. It deliberately avoids any use of an analog tuning voltage control line.

2024年1月1日 · A tunable transformer based millimeter-wave digitally controlled oscillator (DCO) is proposed to achieve high frequency resolution with compact area in this paper.

2014年6月1日 · A novel digitally-controlled oscillator (DCO) is reported. Utilizing a new capacitive load, the new DCO is capable of producing much higher output frequencies than existing DCOs. All other components are fully digital and modular, allowing portability to any CMOS process and customization for different applications.