Oscillators – Solid state active element oscillator – Transistors
Reexamination Certificate
2006-10-17
2006-10-17
Chang, Joseph (Department: 2817)
Oscillators
Solid state active element oscillator
Transistors
C331S17700V
Reexamination Certificate
active
07123112
ABSTRACT:
A voltage controlled oscillator is provided. The oscillator has an oscillator amplifier core formed of a complementary pair of FETs connected with their gates in common and connected to share a bias current. An inductance is connected between the common gates and the common drains of the FETs. The inductance may be an inductor element or an inductance of a physical structure of the circuit, such as a bond wire. The voltage controlled oscillator includes a variable capacitor stage connected at the input of the oscillator amplifier stage and a buffer amplifier stage connected at the output of the oscillator amplifier stage. The buffer amplifier of one embodiment includes a pair of complementary FETs having common gates connected to the common drains of the FETs of the oscillator amplifier stage. The buffer amplifier stage also include an inductor and a capacitor connected between common drains of the buffer amplifier FETs and the output.
REFERENCES:
patent: 5475345 (1995-12-01), Gabara
patent: 6750727 (2004-06-01), Sutardja
patent: 6765448 (2004-07-01), Wu et al.
IEEE Journal of Solid-State Circuits, vol. 29, No. 3, Mar. 1994—Integrated Continuous-Time Filter Design—An Overview—Tsividis—pp. 166-176.
IEEE Journal of Solid-State Circuits, vol. 33, No. 3, Mar. 1, 1998 Integrated Circuit Technology Options for RFIC's—Present Status and Future Directions—Larson pp. 387-399.
IEEE Transactions on Microwave Theory and Techniques, vol. 49, No. 1, Jan. 2001—Fully Integrated 5.35—Ghz CMOS VCOs and Prescalers—Hung et al—pp. 17-22.
IEEE Journal of Solid-State Circuits, vol. 36, No. 6, Jun. 2001—Ham et al pp. 896-909.
FP 14.7: A Fully Integrated 2.7V.035μm CMOS VCO for 5GHz Wireless Applications—Bell Labs, Lucent Technologies, Peter Kinget.
IF-TU-54 A 5.8 GHz Fully Integrated Low Power Low Phase Noise CMOS LC VCO for WLAN Applications—Bhattacharjee et al—2002 IEEE MTT-S Digest.
IF-TU-54 A 5.8 GHz Fully Integrated Low Power Phase Noise CMOS LC VCO for WLAN Applications—Bhattacharjee et al—2002 IEE MTT-S Digest.
Cha Choong-yul
Kang Dong Kyun
Lee Sang-Gug
Chang Joseph
NeoReach, Inc.
Seyfarth Shaw LLP
LandOfFree
Complementary 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 Complementary voltage controlled oscillator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Complementary voltage controlled oscillator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3685887