Power amplifier predriver stage

Details Power amplifier predriver stage Power amplifier predriver stage

1995-12-18

1998-09-29

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

330266, 330207P, H01J 2970, H01J 2976

Patent

active

058149538

ABSTRACT:
A power amplifier circuit drives a load with a convergence correction current which is proportional to a convergence correction voltage waveform that is applied to the power amplifier circuit. A predriver stage of the power amplifier circuit comprises first and second transistors in a push-pull configuration. First and second voltage divider networks bias emitter electrodes of the first and second transistors, respectively, so that a common-mode current flow between the first and second transistors is limited. The first and second voltage dividers also protect the first and second transistors, respectively, from damage caused by thermal runaway.

REFERENCES:
patent: 2863008 (1958-12-01), Keonjian
patent: 4166983 (1979-09-01), Lacroix
patent: 4483016 (1984-11-01), Hochstein et al.
patent: 4644288 (1987-02-01), Stanley
patent: 4719393 (1988-01-01), McCanney
patent: 5621357 (1997-04-01), Botti et al.
John Barrett George, patent application Serial No. 08/563,528, filed on Nov. 28, 1995, and entitled Low-Power Transconductance Driver Amplifier.

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