Printing integrator

Details Printing integrator Printing integrator

1977-06-06

1979-09-25

Gruber, Felix D.

Boots, shoes, and leggings

307271, 328150, 340347NT, 364519, G06G 718, G06J 100, H03K 1320

Patent

active

041692870

ABSTRACT:
To provide a printout corresponding to the integral of the current or voltage from any of several different instruments, a printing integrator includes a voltage-to-frequency converter which receives current or voltage through a replaceable buffer amplifier and provides pulses to a counter at a rate proportional to the amplitude of the input current or voltage. The output of the counter is printed in rows along with the time of printing and an indication of the state of the battery.
To generate pulses at a rate proportional to an input signal, a charge is periodically supplied to a feedback capacitor of an operational amplifier from a storage capacitor in the voltage-to-frequency converter, and an input current derived from the signal decreases the charge in the feedback capacitor until the output potential of the operational amplifier drops below a level set on a comparator, thus generating a pulse and initiating another discharge from the storage capacitor into the feedback capacitor.

REFERENCES:
patent: 3183366 (1965-05-01), Brode
patent: 3230358 (1966-01-01), Davis et al.
patent: 3389271 (1968-06-01), Gray
patent: 3504267 (1970-03-01), James et al.
patent: 3517339 (1970-06-01), Hubbard et al.
patent: 3768009 (1973-10-01), Dorey et al.
patent: 3778794 (1973-12-01), Szabo et al.
patent: 3789202 (1974-01-01), Yamanaka
patent: 3842416 (1974-10-01), Eto
patent: 3942110 (1976-03-01), Milkovic
patent: 3998088 (1976-12-01), Kazangey
patent: 4088906 (1978-05-01), Hullwegen
patent: 4118696 (1978-10-01), Warther

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