Offset voltage correction circuit for gridded power tubes

Details Offset voltage correction circuit for gridded power tubes Offset voltage correction circuit for gridded power tubes

1986-08-29

1989-01-10

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307264, 307491, 328227, 328198, H03K 302, H01J 1982

Patent

active

047976268

ABSTRACT:
An offset voltage correction circuit for a gridded power tube, such as a gridded traveling wave tube (GTWT), provides from a pulsed, floating, negatively offset voltage signal representing the pulsed current output of the tube, a corrected pulsed, zero voltage offset signal. Such corrected signal is used in a feedback loop to control the voltage signal provided to the tube grid in a manner causing the pulsed output current of the tube to have a preestablished amplitude. The signal correcting circuit includes a .pi.-shaped network formed of a capacitor and first and second transistors. The two transistors are connected in electrical parallel so that between pulses of the offset voltage signal the first one of the transistors is held off and keeps the second transistor turned on so that the capacitor charges to the negative offset voltage of the offset voltage signal. During the pulses of the offset voltage signal, the first transistor is turned on and thereby turns the second transistor off, causing the capacitor output side to provide a zero offset voltage pulse having an amplitude equal to the sum of the negative offset and positive voltages (the total peak-to-peak voltage) of the voltage offset signal. The zero offset signal is used by a control loop circuit and a grid pulse modulator to provide a control voltage signal to the grid of the tube which maintains the pulsed output current of the tube at a preselected level in spite of tube aging and thermal effects which tend to cause the output current to change.

REFERENCES:
patent: 3463940 (1969-08-01), Kaye et al.
patent: 4093876 (1978-06-01), Henein et al.
patent: 4564863 (1986-01-01), Chamerdy et al.
Preliminary Design Report #3, Oct. 1983 through Dec. 1983, Usaeradcom Contract DAAK20-83-0130. Unpublished report, copy attached.

Affiliated with

Also associated with

Rating

Offset voltage correction circuit for gridded power tubes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Offset voltage correction circuit for gridded power tubes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Offset voltage correction circuit for gridded power tubes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2109579