CIRCUITRY FOR GENERATING RAMP TYPE SIGNALS

A circuit for multiplying two variables wherein one variable is represented by the pulse width of the pulses of a variable pulse width, constant frequency rectangular waveform signal and the second variable is represented by the level of a variable amplitude signal. When the value of the first varia...

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Bibliographische Detailangaben
Hauptverfasser:	CARON, LAVERNE A
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGUE COMPUTERS BASIC ELECTRONIC CIRCUITRY BLASTING CALCULATING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMBUSTION ENGINES COMPUTING COUNTING ELECTRICITY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES LIGHTING MECHANICAL ENGINEERING PHYSICS PULSE TECHNIQUE TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A circuit for multiplying two variables wherein one variable is represented by the pulse width of the pulses of a variable pulse width, constant frequency rectangular waveform signal and the second variable is represented by the level of a variable amplitude signal. When the value of the first variable is zero, pulses of the rectangular waveform signal have a definite non-zero pulse width. An oscillator cicuit produces a reference rectangular waveform signal having a frequency equal to that of the first rectangular waveform signal. From these two rectangular waveform signals there is developed a third rectangular waveform signal having the same frequency but having the width of its pulses directly proportional to the value of the first variable so that the pulses are of zero width when the first variable is zero. A fourth rectangular waveform signal is developed from the third rectangular waveform signal and from said variable amplitude signal such that the pulse amplitude of said fourth rectangular waveform signal is proportional to the value of the second variable and the pulse width is directly proportional to the value of the first variable. The fourth rectangular waveform signal is passed through a low pass filter to produce a DC signal whose magnitude is directly proportional to the area of the output pulses of the fourth rectangular waveform signal and hence to the product of the two variables.