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:
Nov. 27, 1990
Filed:
May. 10, 1990
Francois Desjardins, Mary Hill, CA;
Electrohome Limited, Kitchener, CA;
Abstract
A cascode mirror video amplifier for generating equal amplitude and opposite phase signals for driving a cathode and control grid of a cathode ray tube. The video amplifier comprises a pair of common base amplifiers connected via equal valued resistances to a pair of opposite polarity power sources. A common emitter amplifier is connected intermediate the pair of cascaded common base amplifiers and functions as a voltage control current source for receiving an input signal and in response generating a common current signal within each of the pair of common base amplifiers such that equal amplitude and opposite phase voltage signals are generated across the respective resistances. A pair of emitter follower stages apply the voltage across the resistance pair to the electron source cathode and control grid respectively while isolating the load capacitance of the cathode ray tube from each of the common base amplifiers.