Cross coupled cascode voltage controlled oscillator

Details Cross coupled cascode voltage controlled oscillator Cross coupled cascode voltage controlled oscillator

2002-10-28

2004-03-02

Kinkead, Arnold (Department: 2817)

Oscillators

Solid state active element oscillator

Transistors

C331S1170FE, C331S03600C, C331S167000

Reexamination Certificate

active

06700451

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates generally to the field of voltage controlled oscillators. More particularly, the invention relates to a cross-coupled cascode voltage controlled oscillator.
2. Discussion of the Related Art
A voltage controlled oscillator (VCO) is a circuit that generates an oscillating signal at a frequency proportional to an externally applied control voltage. These types of circuits find several applications in telecommunications, and are useful for tracking and matching signal frequencies as they shift due to thermal variations, power supply fluctuations, and other sources of frequency shifts.
Typically, a VCO comprises a resonant circuit coupled to an amplifier circuit. The amplifier design can be critical since modern electronics often requires a VCO to operate with a large signal swing or amplitude. A problem with current technology is that large signal operation often causes voltage breakdown processes.
In the prior art, drain to gate voltage breakdown problems that occur in the amplifier circuit of a VCO have been solved by reducing the supply voltage and/or using higher breakdown parts. Nevertheless, these measures tend to reduce signal swing and result in degradation of signal-to-noise floor performance, making it difficult to meet the far-out noise requirements of several applications. Further, higher breakdown parts may not be available, or may not meet other design specifications.
Until now, the requirements of providing a method and/or apparatus for a voltage controlled oscillator which allows a high signal swing while minimizing breakdown problems have not been met.


REFERENCES:
patent: 5469118 (1995-11-01), Lawton
patent: 5621362 (1997-04-01), McKinney et al.
patent: 6016082 (2000-01-01), Cruz et al.

Affiliated with

Also associated with

Rating

Cross coupled cascode voltage controlled oscillator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cross coupled cascode voltage controlled oscillator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cross coupled cascode voltage controlled oscillator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3254813