Registers – Transfer mechanism – Traveling pawl
Patent
1976-04-14
1977-06-07
Atkinson, Charles E.
Registers
Transfer mechanism
Traveling pawl
2351505, 307264, 330145, 340347AD, G06F 1520, G06J 102
Patent
active
040285340
ABSTRACT:
An analyzer, for measuring the concentration of a particular material in a ample, has its analog voltage output connected to the analog input of a multiplying digital-to-analog converter (MDAC) whose output is connected to a voltmeter and to one input of a voltage comparator having its other input connected to a potentiometer and battery producing a reference voltage somewhat less than the known output voltage of the sample. The comparator output is connected to two gates which control the transmission of electrical pulses from a generator to the UP or DOWN inputs of a binary UP/DOWN counter, having N digital output channels connected to N digital input channels of the MDAC, in such manner that the counter counts UP, increasing the gain of the MDAC, when the MDAC output voltage is lower than the reference voltage, or counts DOWN, decreasing the MDAC gain, when the MDAC output voltage is higher than the reference voltage. After a short time, the gates are closed, to inactivate the comparator and counter, and the circuit is used, with fixed MDAC gain and fixed reference voltage, to measure the output voltage or concentration of an unknown sample. At any time, the circuit can be re-calibrated in the same manner, with a standard sample.
REFERENCES:
patent: 2592308 (1952-04-01), Meacham
patent: 3409251 (1968-11-01), Lawson et al.
patent: 3462588 (1969-08-01), Hussey
patent: 3969683 (1976-07-01), Fabricius
Atkinson Charles E.
Edelberg Nathan
Erkkila A. Victor
Krass Errol A.
The United States of America as represented by the Secretary of
LandOfFree
Automatic span 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 Automatic span circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic span circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1238488