Serially RC coupled quadrature oscillator

Oscillators – Solid state active element oscillator – Transistors

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C331S045000, C331S1170FE

Reexamination Certificate

active

11253732

ABSTRACT:
The oscillator includes: a first oscillator circuit in which first and second transistors cross-connected to each other are connected to a resonant circuit; and a second oscillator circuit in which third and fourth transistors cross-connected to each other are connected to a resonant circuit, wherein a coupling capacitor and coupling resistor are serially provided between a collector terminal of the first transistor and a base terminal of the fourth transistor, and a coupling capacitor and coupling resistor are serially provided between a collector terminal of the second transistor and a base terminal of the third transistor, and a coupling capacitor and coupling resistor are serially provided between a collector terminal of the third transistor and a base terminal of the first transistor, and a coupling capacitor and coupling resistor are serially provided between a collector terminal of the fourth transistor and a base terminal of the second transistor. On this account, it is possible to suppress noises and reduce power consumption.

REFERENCES:
patent: 5912596 (1999-06-01), Ghoshal
patent: 6404293 (2002-06-01), Darabi et al.
patent: 6456167 (2002-09-01), Huang
patent: 6639481 (2003-10-01), Ravi et al.
patent: 2002/0093385 (2002-07-01), Nishiyama et al.
patent: 2002/0109556 (2002-08-01), Leenaerts et al.
patent: 2004/0061563 (2004-04-01), Akeyama et al.
patent: 2004/0150484 (2004-08-01), Jacobsson et al.
patent: 30-5043 (1955-07-01), None
A. Rofougaran et al., “A 900MHz CMOS LC-Oscillator with quadrature outputs,” Int. Solid-State Circuits Conference, San Francisco, CA, 1996.
J. van der Tang et al., “Analysis and design of an optimally coupled 5-GHz quadrature LC oscillator,” IEEE journal of Solid-State Circuits, vol. 37, No. 5, May 2002, pp. 657-661.
P. Andreani et al., “Analysis and design of a 1.8-GHz CMOS LC quadrature VCO,” IEEE journal of Solid-State Circuits, vol. 37, No. 12, Dec. 2002, pp. 1737-1747.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Serially RC coupled quadrature 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 Serially RC coupled quadrature oscillator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Serially RC coupled quadrature oscillator will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3761517

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.