Patent · US Expired

Voltage controlled oscillator

US7315220B1 · kind B1 · utility

14Cited by

2References

18Claims

0Family size

Assignee

XILINX, INC. · US

Inventors

Moises E. Robinson · Austin, US
Shahriar Rokhsaz · Austin, US
Marwan Hassoun · Austin, US
Earl Swartzlander · Austin, US

Key dates

Filing date	Jan 27, 2006
Grant date	Jan 1, 2008
Priority date	—
Expiry date	Apr 4, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH03L2207/06
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A voltage controlled oscillator (VCO) having a single stage ring-oscillator having both coarse and fine control of the frequency of oscillation is described. In an embodiment the VCO may include a first n-channel latch having a first output and a second output; a first P-channel transistor coupled between a voltage supply and a first VCO output, where a gate of the first P-channel transistor is coupled to the first output of the first n-channel latch; a first programmable resistor circuit coupled between the first VCO output and the first output of the first n-channel latch; and a second n-channel latch coupled to the first VCO output.

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