The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 1998
Filed:
Sep. 14, 1994
Kentaro Ozawa, Kanagawa-ken, JP;
Leader Electronics Corp., Kanagawa, JP;
Abstract
An apparatus for displaying a waveform of an input signal on a display includes a synchronization detecting circuit, a sweep generating circuit, a horizontal axis drive circuit, a switching circuit, a variable gain amplifier, a vertical axis drive circuit, and a vertical location arrangement circuit. The horizontal axis drive circuit drives the horizontal axis of the display on the basis of a sweep signal generated at the sweep generating circuit synchronously with a sweep trigger signal obtained by dividing synchronization detecting pulses from the synchronization detecting circuit by N (N-1, 2, . . . ). The switching circuit alternately transfers the input signal and a cursor signal at a high rate to provide a multiplexed input/cursor signal to the vertical axis drive circuit through the variable gain amplifier. The vertical location arrangement circuit generates a vertical location arrangement signal stepwisely variable synchronously with the sweep trigger signal to the vertical axis drive circuit, where the multiplexed input/cursor and vertical location arrangement signals are combined to provide a vertical axis drive signal. Accordingly at least two sliced portions of the waveform with the cursors are displayed on the left and right sides of the display in an enlarged/divided display mode (N.gtoreq.2), and the whole waveform with the cursors is displayed on the display in a normal display mode (N=1).