Oscillators – Automatic frequency stabilization using a phase or frequency... – With reference oscillator or source
Patent
1983-08-17
1984-10-02
Miller, Stanley D.
Oscillators
Automatic frequency stabilization using a phase or frequency...
With reference oscillator or source
331 22, 307512, 328134, 328155, H03L 700, H03L 706
Patent
active
044750889
ABSTRACT:
Quadrature detectors are subject to errors due to both phase and amplitude mismatches. The disclosed invention comprises a system for sampling the I and Q channel output signals of a quadrature detector and processing these signals to generate a signal which has a predetermined relationship to the phase error in the in-phase and quadrature signals independent of amplitude mismatches in said signals. The necessary mathematical computations can be performed by analog or digital circuitry. Phase error correction can be accomplished by a servo loop which changes the relative phase of the reference signals to the I and Q channels or by mathematically correcting the I and Q channel output signals to reduce the phase error.
REFERENCES:
patent: 3624274 (1971-11-01), Araki et al.
patent: 4041533 (1977-08-01), Yamamoto et al.
patent: 4085378 (1978-04-01), Ryan et al.
patent: 4137505 (1979-01-01), Guanella
patent: 4143322 (1979-03-01), Shimamura
patent: 4156204 (1979-05-01), Hargis
patent: 4164624 (1979-08-01), Ogita
patent: 4190807 (1980-02-01), Weber
patent: 4229824 (1980-10-01), En
patent: 4238739 (1980-12-01), Mosley et al.
patent: 4314206 (1982-02-01), Attwood et al.
patent: 4336500 (1982-06-01), Attwood
patent: 4344178 (1982-08-01), Waters
Hinson J. B.
Miller Stanley D.
Paxman W. R.
Westinghouse Electric Corp.
LandOfFree
Gain imbalance corrected quadrature phase detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gain imbalance corrected quadrature phase detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gain imbalance corrected quadrature phase detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-528458