Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tobis Tonbild Syndikat GmbH
Original Assignee
Tobis Tonbild Syndikat GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tobis Tonbild Syndikat GmbHfiledCriticalTobis Tonbild Syndikat GmbH
Application grantedgrantedCritical
Publication of FR880032ApublicationCriticalpatent/FR880032A/fr
H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
H01J40/02—Details
H01J40/14—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03G—CONTROL OF AMPLIFICATION
H03G7/00—Volume compression or expansion in amplifiers
H03G7/02—Volume compression or expansion in amplifiers having discharge tubes
FR880032D1941-03-241942-03-07Réglage dynamique automatique du volume sonore dans la reproduction d'enregistrements sonores photographiques
ExpiredFR880032A
(fr)