Amplifiers – Signal feedback – Compensating for inter-electrode impedance
Patent
1988-10-14
1990-03-20
Mullins, James B.
Amplifiers
Signal feedback
Compensating for inter-electrode impedance
H03F 116
Patent
active
049104764
ABSTRACT:
High frequency amplifiers require neutrodyning to prevent the risks of self-oscillation generated by the existence of stray capacitances among the electrodes of the active component used in the amplifier. Grid tube amplifiers (such as triodes, tetrodes, pentodes etc.) are more particularly concerned. Instead of simply providing a variable inductive element, in parallel, on the stray capacitance between the input electrode and the output electrode, there is provided a star connection of three reactances between the input electrode, the output electrode and the reference electrode. Only the first reactance is variable. The others are fixed and are in a constant ratio independent of the frequency. Preferably, the variable reactance element is an inductive element, and the other two are capacitive elements. Thus, by means of this single, variable reactance element, it is possible to make a setting, at the same time, of the input or output frequency tuning of the amplifier and of the neutrodyning.
REFERENCES:
patent: 1646027 (1927-10-01), Lange
patent: 3546613 (1970-12-01), Breuer
Japanese Journal of Applied Physics, vol. 20, suppl. 20-1, 1981, pp. 87-91, Tokyo, JP; M. Aiga et al.
Benoit Michel
Peillex-Delphe Guy
"Thomson-CSF"
Mullins James B.
LandOfFree
High-frequency amplifier with automatic neutrodyning circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High-frequency amplifier with automatic neutrodyning circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-frequency amplifier with automatic neutrodyning circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-794870