Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1988-08-29
1990-07-31
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307521, 307271, H03B 100, H03K 500
Patent
active
049453114
ABSTRACT:
One or more active RC filter network stages of an electronically variable equalizer filter have R values which can be varied to maintain a substantially constant ratio of R values for each stage to vary the cutoff frequency of the equalizer filter while maintaining the relative shapes of the magnitude and phase characteristics of the equalizer filter. A control signal is generated to simultaneously vary the R values for the various network stages. The resistance value of the RC circuit of monostable multivibrator is controlled by control signal so that the multivibrator output pulse width is equal to a reference pulse width. The control signal is utilized to obtain the same R value for a number of other R values formed on a single substrate.
REFERENCES:
patent: 3532908 (1970-10-01), Jennings
patent: 3821797 (1974-06-01), Suzuki et al.
patent: 4045731 (1977-08-01), Tokunou et al.
patent: 4346412 (1982-08-01), Conley
patent: 4370681 (1983-01-01), Akagiri
patent: 4371900 (1983-02-01), Haber
patent: 4498111 (1985-02-01), Rijckaert et al.
patent: 4517612 (1985-05-01), Rijckaert et al.
patent: 4562492 (1985-12-01), Higurashi
patent: 4564869 (1986-01-01), Baumeister
patent: 4801827 (1989-01-01), Metz
patent: 4809336 (1989-02-01), Pritchard
patent: 4853802 (1989-08-01), Kukson et al.
"Arbitrary Equalization with Simple L. C. Structures", by Kost et al., IEEE Transactions on Magnetics, vol. MAG-17, No. 6, Nov. 1981.
"Switched Resistor Resonator for an Active Bandpass Filter", IBM Technical Disclosure, vol. 23, No. 9, Feb. 1981, by Zumbado.
"Two Active Low Pass Instrumentation Filters", Instruments and Control Systems, Aug. 1971, vol. 44, No. 8, by Simpson.
"Active Band-Pass Filter", IBM Technical Disclosure, vol. 11, No. 5, Oct. 1968, Hurel et al.
Miller Stanley D.
Roseen Richard
Seagate Technology Inc.
LandOfFree
Electronically variable equalizer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electronically variable equalizer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronically variable equalizer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1400868