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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.)
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Publication date
Application filedfiledCritical
Priority to JP1977010054UpriorityCriticalpatent/JPS5721379Y2/ja
Priority to US05/874,153prioritypatent/US4155048A/en
Publication of JPS53106647UpublicationCriticalpatent/JPS53106647U/ja
Application grantedgrantedCritical
Publication of JPS5721379Y2publicationCriticalpatent/JPS5721379Y2/ja
H03G3/00—Gain control in amplifiers or frequency changers
H03G3/20—Automatic control
H03G3/30—Automatic control in amplifiers having semiconductor devices
H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
H03G3/301—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable
H03G3/3015—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable using diodes or transistors