Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1987-08-07
1989-03-21
Heyman, John S.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
328151, 307352, 307 49D, H03K 604, H03K 406
Patent
active
048147141
ABSTRACT:
A method and apparatus for performing integration using a circuit capable of integrating an input signal over a wide linear dynamic range. The circuit modulates the input signal with a biphase signal having positive and negative phases. The modulated signal is then provided to an integrator. The integrator operates continuously within its linear range without needing charge dumping because the amplitude of the modulated signal is less than the amplitude required to saturate the integrator. Each interval of the integrated signal corresponding to positive and negative phases of the biphase signal is then partitioned into intervals corresponding to the positive phase and intervals corresponding to the negative phases by two track and hold circuits with alternating tracking and holding periods. The signal intervals corresponding to the negative phase of the biphase signal are subtracted from the intervals corresponding to the positive phases by a differential amplifier. These subtracted intervals are then added together by a sample-and-hold circuit joined with a summing circuit to produce the integrated signal corresponding to the linear integration of the input signal. The circuit is thus the mathematical equivalent of dividing the desired period of integration into a finite number of intervals, integrating each interval over that subdivided portion of the desired integration period, then adding the integrals of the intervals which equals the integral over the desired integration period. The frequency of the biphase signal can be adjusted so that integration of the subdivided portions of the desired period of integration requires capacitors sizes capable of being incorporated onto an integrated circuit.
REFERENCES:
patent: 3740586 (1973-06-01), Banks et al.
patent: 3879724 (1975-04-01), McDonald
patent: 3927378 (1975-12-01), Fjallbrant
patent: 4160922 (1979-07-01), Rickenbacker
patent: 4390844 (1983-06-01), Ting
patent: 4511852 (1985-04-01), Henrich et al.
Hazeltine Corporation
Heyman John S.
Onders E. A.
LandOfFree
Long time constant integrating circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Long time constant integrating circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Long time constant integrating circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-479761