Patent · US Active

Reduced phase noise multi-band VCO

US8098111B2 · kind B2 · utility

1Cited by

2References

17Claims

0Family size

Assignee

Broadcom Corporation · US

Inventors

Calvin Chen · Irvine, US
Morteza Vadipour · Irvine, US
Xinyu Chen · Bellaire, US

Key dates

Filing date	Jan 26, 2010
Grant date	Jan 17, 2012
Priority date	—
Expiry date	Jan 26, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH03B5/1243
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

Embodiments of a multi-band voltage controlled oscillator (VCO) are provided herein. The multi-band VCO is configured to adjust a frequency of an output signal based on an input signal. The multi-band VCO includes a tank module, an active module, and a control module. The tank module includes a parallel combination of a capacitor and an inductor. The active module includes a pair of cross-coupled transistors that are configured to provide a negative conductance that cancels out a positive conductance associated with the tank module. To improve the phase noise associated with the multi-band VCO, the control module is configured to adjust the body voltage of the cross-coupled transistors.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.