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US 3,938,049 AGranted
Baseline correction system for pulse trains
AssigneeAkro-Medic Engineering, Inc.
InventorsJesse L. Acker, Peter M. Meserol
Life of this patent
Estimating the term…
Abstract
Baseline correction for a pulse train is achieved by arranging the source generating the pulse train in series circuit with a switch and by rendering the switch selectively conductive during time periods coextensive with the separation interval between successive pulses in the pulse train. The switch output is stored and is subtractively combined with the pulse train. Switching control is effected by a signal generator which also time controls generation of the pulse train.
Claims6
In combination:
- a. a source generating a train of pulses separated by intervals of varying baseline levels;
- b. signal generator means for generating an output signal for each successive pair of said pulses, said output signal being of time extent equal to the interval separating such pulse pair;
- c. switch means having an input terminal for receiving said train of pulses, a control terminal for receiving such output signals and an output terminal, said switch means being rendered conductive throughout occurrence of said output signals;
- d. signal storage means connected to said switch means output terminal for storing signals conducted through said switch means;
- and
- e. differential amplifier means having a first input terminal for receiving said signals stored in said storage means, a second input terminal for receiving said train of pulses and an output terminal providing signals indicative of the level difference between said pulse train and said stored signals.
3 more elements
In combination:
- a. a source generating a train of pulses separated by intervals of varying baseline levels;
- b. signal generator means for generating an output signal for each successive pair of said pulses, said output signal being of time extent equal to the interval separating such pulse pair;
- c. switch means having an input terminal, a control terminal and an output terminal;
- d. first buffer circuit means for connecting said source to said switch means input terminal;
- e. second buffer circuit means for connecting said signal generator means to said switch means control terminal whereby said switch means is rendered conductive throughout occurrence of said output signals;
- f. signal storage means connected to said switch means output terminal for storing signals conducted through said switch means;
- g. differential amplifier means having a first input terminal, a second input terminal connected to said source for receiving said train of pulses and an output terminal providing signals indicative of the level difference between signals applied to said first and second input terminals;
- and
- h. third buffer circuit means for connecting said signal storage means to said first input terminal of said differential amplifier means.
6 more elements
Dependencies are inferred from the claim text.