Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Reexamination Certificate
2006-01-10
2006-01-10
Lam, Tuan T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
C327S318000, C330S149000
Reexamination Certificate
active
06985020
ABSTRACT:
An inline predistortion circuit for producing composite second order (CSO) and composite triple beat (CTB) distortion correction of a laser transmitter is disclosed having an RF input signal, a diode for producing nonlinear current, and a DC voltage bias for controlling the nonlinear current. The predistortion circuit lacks DC blocking capacitors between the RF attenuator and the diode, which results in improved nonlinear current generation across a wide frequency range. A capacitor in parallel with the bias circuit further increases diode's capability for producing nonlinear current. A low resistance resistor in series with the RF signal path and in parallel with the diode provides the voltage necessary for the diode to conduct while minimizing RF signal attenuation. An inductor in series with the RF signal provides improved phase correction of the CSO and CTB predistortion circuit. A temperature compensation circuit is also integrated into the circuit to reduce the effect of temperature variations on the correction circuit.
REFERENCES:
patent: 4808810 (1989-02-01), Van Doorn
patent: 4882482 (1989-11-01), Smith et al.
patent: 4992754 (1991-02-01), Blauvelt et al.
patent: 4998012 (1991-03-01), Kruse
patent: 5161044 (1992-11-01), Nazarathy et al.
patent: 5172068 (1992-12-01), Childs
patent: 5321710 (1994-06-01), Cornish et al.
patent: 5418637 (1995-05-01), Kuo
patent: 5424680 (1995-06-01), Nazarathy et al.
patent: 5455705 (1995-10-01), Gusinov
patent: 5481389 (1996-01-01), Pidgeon et al.
patent: 5523716 (1996-06-01), Grebliunas et al.
patent: 5568087 (1996-10-01), Gatti
patent: 5589797 (1996-12-01), Gans et al.
patent: 5600472 (1997-02-01), Uesaka
patent: 5703530 (1997-12-01), Sato et al.
patent: 5752174 (1998-05-01), Matai et al.
patent: 5770430 (1998-06-01), Howell et al.
patent: 5798854 (1998-08-01), Blauvelt et al.
patent: 5850305 (1998-12-01), Pidgeon
patent: 5909642 (1999-06-01), Suzuki
patent: 6069534 (2000-05-01), Kobayashi
patent: 6107877 (2000-08-01), Miguelez et al.
patent: 6122085 (2000-09-01), Bitler
patent: 6204718 (2001-03-01), Pidgeon, Jr.
patent: 6577177 (2003-06-01), Zhou et al.
patent: 3024533 (1982-01-01), None
patent: 3338024 (1985-05-01), None
patent: 4212772 (1993-10-01), None
patent: 2656436 (1998-06-01), None
patent: 0498456 (1992-02-01), None
patent: 0552316 (1992-02-01), None
patent: 0486953 (1992-05-01), None
patent: 0620661 (1994-10-01), None
patent: 1381597 (1975-01-01), None
patent: 2164515 (1986-03-01), None
patent: 9735390 (1997-09-01), None
Optical Receiver Front-End Nonlinear Distortion, Electronics Letters, Apr. 29, 1982, vol. 18, No. 9, pp. 361-362.
Bertelsmeier et al., Linearization of Broadband Optical Transmission Systems by Adaptive Predistortion, 1984, pp. 206-212.
Ha, Solid-State Microwave Amplifier Design, pp. 202-217.
Ohr,GaAs Finds Home In Wireless & High-Speed Data-Communications Applications, Computer Design, Mar. 1994, pp. 59-68.
Personick, Optical Fiber Transmission Systems Applications of Communications Theory, pp. 62-75.
Eggers, 2GHz Bandwidth Predistortion Linearizer For Microwave Power Amplifiers At Ku-Band, pp. 1501-1505, Sep. 1994.
Eggers, Pamela—Linearized Solid State Power Amplifier At Ku-band Frequency, pp. 443-445, Sep. 1993.
Khilla et al., Semiconductor Transmitter Amplifiers And Traveling Wave Tube Linears For Future Communications Satellites, 8273 ANT Telecommunications Engineering Reports, No. 8, Feb. 1991 (including English translation).
Locatelli et al., Microwave Linear Power Amplifier With Micromodule Technology, pp. 1.3.1-1.3.6, Jun. 1987.
Kobayashi et al., A Novel Monolithic Linearized HEMT LNA Using HBT Tuneable Active Feedback, IEEE MTT-S International Microwave Symposium Digest, pp. 1217-1220, Jun. 1996.
General Instrument Corporation
Lam Tuan T.
Nguyen Hiep
Volpe and Koenig P.C.
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