Back to results
US 5,621,433 AGranted
Low-cost multichannel oscilliscope for teaching and demonstration purposes
OwnerFritz Acksteinerinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerFritz Acksteinerinventor
Estimating the term…
The multichannel oscilloscope has a dot matrix display device, advantageously an LCD, with an integrated controller and character generator for forming a display made up of a plurality of characters consisting of pixels on a display screen, a multiplexer device connected to receive data from a plurality of channels and send the data to the dot matrix display device for multichannel display purposes and an additional controller device for controlling the transmission of the data from the multiplexer to the dot matrix display device and for controlling the parameters of the display device. The additional controller device consists of two EPROM units only and a more expensive but versatile microprocessor chip is not necessary. The additional controller device alternately transmits instruction signals defining a position on the display screen and input data signals from the multiplexer device determining a character to be displayed at that position. In one embodiment digital signals that alternate between two values in a plurality of channels can be simultaneously displayed, while in another embodiment the time dependence of varying analog input data signals in a plurality of channels can be displayed.
A multichannel oscilloscope comprising a dot matrix display device including a display screen having a plurality of positions for display of characters consisting of pixels and an integrated controller means and character generating means for forming a display image on the display screen made up of a plurality of said characters in response to input data signals containing character determining information and input instruction signals containing character position determining information, a multiplexer device having means for receiving data signals in any of a plurality of input channels and having means for selecting one of said input data signals for transmission to said integrated controller means of said dot matrix display device and additional controller means for controlling the transmission of the data from the multiplexer device to the dot matrix display device and for generating said input instruction signals for selecting said positions at which said characters are to be displayed, wherein the additional controller means consists of two read-only-memory devices containing means for generating said input instruction signals and means for controlling said multiplexer.
Dependencies are inferred from the claim text.