Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Patent
1996-03-21
1998-02-17
Young, Brian K.
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
H03M 112
Patent
active
057195773
ABSTRACT:
In order to convert an analog signal of digital data transmission into a digital signal, the device embodying the invention comprises a passive analog circuit comprising a capacitor charged by the analog signal via a first resistor, the voltage at the terminals of the capacitor being applied via a second resistor, at the input of a digital circuit comprising a threshold comparator applying, to a flip-flop, a logic signal which is a function of the result of the comparison with a threshold of the voltage at the input, a means for periodically applying at the input a charge or discharge pulse so as to bring the voltage at the input back to the threshold voltage, a counting circuit for periodically determining a number representative of the analog signal, obtained from subtracting the number of discharges from the number of charges.
REFERENCES:
patent: 4298959 (1981-11-01), Sundermeyer et al.
B. Hallgren, Possible Applications of the Sigma Delta Digitizer in Particle Physics, Nuclear Instruments & Methods in Physics Research A, vol. A307, No. 2/03, pp. 436-447, Oct. 1, 1991.
Pitot Christian
Vriz Louis
Sextant Avionique
Young Brian K.
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