Reference: https://leachlegacy.ece.gatech.edu/ec... Support this channel via a special purpose donation to the Georgia Tech Foundation (GTF210000920), earmarked for my work: • [OLD] Support This Channel via a Special P... Jensen 990 Op Amp Datasheet (John Hardy): http://www.johnhardyco.com/pdf/990.pdf Jensen 990 JAES paper: https://www.technicalaudio.com/pdf/Je... Jensen 990 patent: https://patents.google.com/patent/US4... 0:00 -- Introduction 0:43 -- Resistor divider biasing 3:06 -- Output impedance 5:08 -- Zener biasing 5:55 -- Regular diode biasing 6:43 -- Current mirrors 7:29 -- Jensen 990 op amp