Signal control circuit

A circuit comprising:

• a transistor responsive to an incoming signal for producing corresponding signals of mutually opposite polarity, said transistor having a base connected to receive said incoming signal,
• an emitter output circuit for one of said corresponding signals,
• and a collector output circuit for the other of said corresponding signals;
• a rectifier connected to one of said output circuits for rectifying one of said corresponding signals to produce an output signal having a predetermined polarity;
• a smoothing filter connected to said rectifier;
• an output terminal connected to said filter;
• and
• circuit means including a unidirectional circuit connected to the other of said output circuits and responsive to rapidly changing portions of the other of said corresponding signals for connecting said rapidly changing portions to said output terminal in said predetermined polarity.

A circuit comprising:

• a transistor having a base to receive an incoming signal;
• first and second emitter load impedances connected in series,
• a rectifier connected to rectify the voltage across one of said emitter load impedances to produce an output signal having a predetermined polarity;
• a smoothing filter connected to said rectifier;
• an output terminal connected to said filter;
• and
• circuit means comprising a diode and the other of said emitter load impedances, said circuit means being connected in adding relation to said filter to add rapidly changing portions of said incoming signal to the output signal of said filter in said predetermined polarity.

A circuit comprising:

• a rectifier to rectify lower frequency components of an incoming signal to produce an output signal having a predetermined polarity;
• a smoothing filter connected to said rectifier;
• an output terminal connected to said filter for receiving said output signal therefrom;
• and
• circuit means for supplying only rapidly changing portions in said incoming signal directly to said output terminal, said circuit means being nonresponsive to said lower frequency components and having a short attack time in comparison with that of said smoothing filter such that said circuit means connects only rapidly changing portions of said incoming signal to said output terminal in said predetermined polarity.