Headcode Topology Inspirations

Headcode Topology Inspirations The Ability of the casscode circuit at producing clean natural sound has resulted in the casscoding of each stage of the amplifier. The Basic gain cell of the casscode is discussed http://www.web-ee.com/primers/files/col_0412.pdf From John Broskie's Guide to Tube Circuit Analysis & Design we have a discussion on using solid-state casscoding in the Curry Tube amp. Reflections on perfection article http://www.tubecad.com/2005/January/blog0027.htm http://www.tubecad.com/2005/January/04Jan2005.pdf In PDF format The marvelous cascode http://ocw.mit.edu/NR/rdonlyres/Electrical-Engineering-and-Computer-Science/6012Fall2003/3357ABFB-0AFE-40FC-960C-1E5E23176FD6/0/lec23_marvelous.pdf A nice DIY phone stage however highlighting the advantages of cascoding http://www.klaus-boening.de/html/phonostage.html Dynamic Biasing is another topology that has proven to provide Improved Sonics over conventional Class A and Class Ab output stages. Dynamic biasing in High end audio Amplifiers was popularized by Nelson pass and his stasis series or Power Amplifiers for loudspeakers. http://patft.uspto.gov/netacgi/nphParser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2Fsearchbool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F4502020 Dynamic Biasing was just one aspect of the unique stasis circuit however the primary selling point was the use of local feedback to allow the output stage to operate outside of the overall feedback loop with low distortion. Since operation within an overall feedback loop is desirable LaRocco Audio had to develop the proprietary Circuitry utilized in the Bi-code topology. So wonderful are the attributes of dynamic biasing that many others have and or are investigating this technique as well however as you can imagine LaRocco Audio’s version is the best From 1984 we have fully complimentary and dynamic basing used with casscoding to obtain low power operation with low distortion. Again not quite as elegant as we would like but still interesting http://patft.uspto.gov/netacgi/nphParser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2Fsearchbool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F4638260 The most elegant dynamic biasing method used by others are the old Technics New Class A Syncro Bias circuithttp://patft.uspto.gov/netacgi/nphParser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2Fsearchbool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F4115739