Title: Corona discharge detection apparatus which eliminates periodic noise

Abstract: A corona discharge detection apparatus particularly suited for use in detecting corona signals mixed with noise which is in synchronism with a cycle of a power supply such as corona discharge which occurs in a flyback transformer of a television receiver. The noise and the corona signals are converted to a digital signal and the digital signals in two cycles are subtracted one from the other and the resulting digital signal is converted to an analog signal for observation. In this manner, a corona signal which has not been detected by a phase technique can now be detected.

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Inventors: Yoshino, Hironori (Takarazuka, JP)

Application Number: 846397
Filing Date: 1977-10-28
Publication_date: 1980-03-04
Assignee: Matsushita Electric Industrial Co. Ltd. (Osaka, JP)
Primary Class(es): 324/547 324/72, 327/90, 327/552
Other Classes:
US Patent Ref:

3015774	Jan, 1962	Eigen	324/54.
3403227	Sep, 1968	Malm	324/77.
3727129	Apr, 1973	Hummert	324/54.
3737769	Jun, 1973	Terase et al.	324/54.
3739272	Jun, 1973	McKean	324/54.
3758763	Sep, 1973	Nohara et al.	324/83.
3763362	Oct, 1973	Griem	364/574.
3816815	Jun, 1974	Schumann	324/102.
3889185	Jun, 1975	Wojtasinski et al.	324/72.
3917996	Nov, 1975	Wagner et al.	324/72.
3927309	Dec, 1975	Fujiwara et al.	328/135.
4054785	Oct, 1977	Lehmann	324/77.

Other Refs:
Primary Examiner: Strecker, Gerard R.
Assistant Examiner:
Attorney: Stevens, Davis, Miller & Mosher