Signal stretcher for envelope generator

A signal envelope stretcher comprising:

• first means for following increasing portions of an input signal and retaining the peak magnitude as its output for a predetermined interval;
• second means including input selecting means,storing means, output selecting means, and feedback means;
• said input selecting means, connected to the output of said first means, for applying the previous peak magnitude to said storing means as said first means starts retaining each peak magnitude;
• said feedback means, connected to the output of said output selecting means, for applying its stored contents corresponding to the peak of a predetermined number of successive previous peak magnitudes to said input selecting means for a predefined portion of said predetermined interval after each peak magnitude is accepted by said first means;
• said output selecting means producing a second output signal corresponding to the greater of the peak magnitude stored by said storing means and the contents of said feedback means while said feedback means and said storing means replace their stored contents with said second output;
• and
• third means including retaining means and selector means, said retaining means accepting the previous peak magnitude stored from said storing means made available by said output selecting means as said storing means accepts the next peak magnitude;
• and said selector means connected for producing as an output of the signal envelope stretcher the larger of two peak magnitudes stored by said retaining means and stored by said first means.