Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1979-10-19
1981-05-26
Trafton, David L.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
315383, 340793, 358168, G08B 536
Patent
active
042701260
ABSTRACT:
An improved video amplifier arrangement with wideband D-C gain control is disclosed for use in a video display device of the type for displaying character information. The video amplifier includes an open-collector, TTL logic gate for receiving digital voice signal information which is then coupled to a cascode amplifier circuit for amplifying the video information and applying the same to a control element of an associated cathode ray tube. A D-C amplifier is provided having an adjustable element in its base input for applying a selectable D-C voltage thereto. The D-C amplifier includes an emitter resistor which is also connected to the open collector of the logic gate whereby the current developed by the D-C amplifier and applied to the emitter load resistor further determines the load current through the TTL logic gate. This, in turn, controls the level of pulse amplitude of the digital video information and serves as a video gain or level control.
REFERENCES:
patent: 4005262 (1977-01-01), Fijisawa et al.
patent: 4025843 (1977-05-01), Parker
Gillman James W.
Motorola Inc.
Southard Donald B.
Trafton David L.
LandOfFree
Video amplifier arrangement with wideband D-C gain control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Video amplifier arrangement with wideband D-C gain control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video amplifier arrangement with wideband D-C gain control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-455649