A Sawtooth Waveform Generating Circuit for Utilization in a Helmet Mounted Display.

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Abstract:

A sawtooth waveform circuit for a cathode ray tube display apparatus or the like is disclosed for providing a sawtooth waveform signal in synchronization with the uniformly spaced pulses of a sync signal. A direct current voltage is supplied to an integrator which produces a ramp voltage. Switching means responsive to each pulse of the sync signal shorts the integrator so as to cause the ramp voltage to appear at the output of the integrator as a sawtooth waveform signal. A summing amplifier amplifies the sawtooth waveform signal, and then combines the amplifier sawtooth waveform signal with a variable direct current voltage generated by a head tracker so as to provide at the output of the summing amplifier a raster drive signal. Author

Author(s):
Berke, Herbert ; Allen, John H. ; Owen, Joseph R.
Author Organization(s):
DEPARTMENT OF THE NAVY WASHINGTON DC
Descriptive Note:
Patent Application,
Pagination:
0013

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Availability: This Government-owned Invention Available For U.s. Licensing And, Possibly, For Foreign Licensing. Copy Of Application Available Ntis.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
PAT-APPL-167 275
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*Patent applications, *Sweep generators, Helmet mounted displays, Sawtooth waveforms, Cathode ray tubes, Direct current, Rasters, Signals
Field(s)/Group(s):
Electrooptical and Optoelectronic Devices
Keyword(s):
Head trackers
Report Date:
1980 Jul 19