A novel noise-shifting differential Colpitts VCO is presented. It uses current switching to lower phase noise by cyclostationary noise alignment and improve the start-up condition. A design strategy is also devised to enhance the phase noise performance of quadrature coupled oscillators. Two integrated VCOs are presented as design examples.

A single stage source coupled Complementary Metal Oxide Semiconductor Voltage Controlled Oscillator (CMOS VCO) is designed in this paper. The design is implemented in Cadence environment with high oscillation frequency and low power consumption. This design is a single stage and it has low phase noise because author has reduced noise sources. Oscillation frequency of the designed VCO is ranges ...

The voltage controlled oscillator (VCO) is a critical sub-block in communications transceivers. The role of the VCO in a transceiver and the VCO requirements are first reviewed. The necessity of GHz VCOs and the driving factors towards the monolithic integration of the VCO are examined. VCO design techniques are outlined and design trade-offs are explored. The performance of VCOs in different i...

A 60 GHz cross-coupled differential voltage controlled oscillator is designed in 130 nm CMOS technology. The tuning range is from 57GHz to 66GHz, with an estimated phase noise of -93 dBc/Hz at 1 MHz offset. The oscillator employs fundamental 30 GHz VCO followed by doublers and buffers. Key-Words: CMOS, 60GHz, VCO, wide tuning range, phase noise

This paper describes the design and fabrication of a clock and data recovery circuit (CDR). We propose a new clock and data recovery which is based on a 1/4-rate frequency detector (QRFD). The proposed frequency detector helps reduce the VCO frequency and is thus advantageous for high speed application. The proposed frequency detector can achieve low jitter operation and extend the pull-in rang...

Oscillators play a decisive role for electronic equipment in many fields – like communication, navigation or data processing. Especially oscillators are key building blocks in integrated transceivers for wired and wireless communication systems. In this context the study of fully integrated differential VCOs has received attention. In this paper we present an analytic analysis of the steady sta...

—In this paper, design and fabrication of a Ku-band voltage-controlled oscillator (VCO) using commercially available 0.18 μm SiGe BiCMOS technology is presented. To achieve the low phase noise, the VCO employs a gm-boosted configuration which is a combination of cross coupled VCO and balanced Colpitts VCO, and the VCO simultaneously achieves wide tuning range. The tested results show that the ...