Coded data generation or conversion – Sample and hold
Patent
1987-11-13
1989-05-09
Miska, Vit W.
Coded data generation or conversion
Sample and hold
331 18, 341166, H03L 706, H03M 100
Patent
active
048293016
ABSTRACT:
There is provided a digitally controlled first order hold circuit and waveform synthesizer for digitally controlling the representation of a function over an approximation interval. In accordance with the operation of the invention, the first order hold circuit and waveform generator receives a digital data input signal which contains initial condition data, up/down data, and slope data for the approximation interval. The initial condition data is loaded into an up/down counter which is incremented using counting data at a rate depending on the value of the slope data and in a direction depending on the value of the up-down data. In order to minimize delays arising from data acquistion, two frequency synthesizer circuits are provided such that one frequency synthesizer provides counting data while the other frequency synthesizer receives slope data. During alternating intervals, the other frequency synthesizer circuit provides counting data while the other circuit receives slope data. In addition, long length data input signals covering a plurality of approximation intervals are provided to reduce the demands on a main system central processing unit.
REFERENCES:
patent: 4251779 (1981-02-01), Kellogg et al.
patent: 4326173 (1982-04-01), Newman
patent: 4454486 (1984-06-01), Hassun et al.
patent: 4489287 (1984-12-01), Naguno et al.
patent: 4626787 (1986-12-01), Mefford
patent: 4679004 (1987-07-01), Takahara et al.
Chan Fred N.
Wensley Gerald J.
Allen Kenneth R.
Ford Aerospace & Communications Corporation
Goh Helen
Miska Vit W.
Radlo Edward J.
LandOfFree
Digital first order hold 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 Digital first order hold circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital first order hold circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-92026