|
K&K Audio / Lundahl Transformers Welcome! Need support, you got it. Or share youe ideas and experiences. |
For Sale Ads |
Use this form to submit comments directly to the Asylum moderators for this forum. We're particularly interested in truly outstanding posts that might be added to our FAQs.You may also use this form to provide feedback or to call attention to messages that may be in violation of our content rules.
Original Message
RE: Ess9018, Diff. Pair and your CCS...will this work ?
Posted by JKT on February 11, 2017 at 12:18:27:
Looking at the schematic you would need to build a negative PS (about -20V to -30V) to provide enough voltage margin to operate a cascode MOSFET current source. Although these CCSs will operate at 5mA current they perform better at currents greater than 10mA. In my experience a BJT cascode using BC549C transistors will give greater performance at currents less than 10mA. This would still entail building a negative PS.