Video signal driver including a cascode transistor
AssigneeThomson Consumer Electronics, Inc.
InventorJohn Barrett George
Life of this patent
Estimating the term…
Abstract
A kinescope video driver includes a series connection of a main cascode transistor coupled to a cathode of a cathode ray tube and a video signal amplifying transistor. A second cascode transistor is coupled between the main cascode transistor and the video signal amplifying transistor. The second transistor is coupled to the video signal amplifying transistor through a short wire conductor and to the main cascode transistor through a long wire conductor.
Claims12
A video driver stage for an electrode of a cathode ray tube, comprising:
- a source of a first video signal;
- an amplifying transistor responsive to said first video signal for amplifying said first video signal;
- a first cascode transistor coupled to said amplifying transistor;
- a second cascode transistor coupled to said first cascode transistor such that said first cascode transistor is coupled in a signal path between said amplifying and said second cascode transistors, said second cascode transistor being coupled to said cathode ray tube electrode for applying said first video signal to said cathode ray tube electrode.
A video driver stage for a cathode electrode of a cathode ray tube, comprising:
- a first transistor coupled to a cathode electrode of said cathode ray tube;
- a second transistor responsive to a first video signal and coupled to said first transistor to form a first cascode video amplifier;
- and
- a second cascode video amplifier responsive to a second video signal and coupled to said first transistor via a signal path that bypasses said second transistor.
A video driver stage for an electrode of a cathode ray tube, comprising:
- a source of a first video signal;
- an amplifying transistor responsive to said first video signal for amplifying said first video signal;
- a first transistor coupled to said amplifying transistor in a cascode configuration;
- a second transistor coupled to said first transistor in a cascode configuration such that said first transistor is coupled in a signal path between said amplifying and said second transistors, said second transistor being coupled to said cathode ray tube electrode for applying said first video signal to said cathode ray tube electrode.
Dependencies are inferred from the claim text.