You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

37 lines
954 B

4 years ago
  1. on the patent
  2. its the Vbe TC that is used.
  3. on the lm334,
  4. it's the IC, and an external diode for the TC equalizing (if you use the example circuit later on to
  5. balance the TC)
  6. on the patent
  7. figure 3 is the basic example.
  8. fig 1 omits the current mirror.
  9. figure 3 is described in the details section of the patent
  10. figure 4 or 5 has additional balancing.
  11. todo: build figure 20, and test to see what kind of current lowering I can get
  12. todo: build transistor only circuit of this current source, based on schematic in LM334 data sheet.
  13. might need multiple emitter transistor EDIT: I don't think so. they aren't common in standalone packages.
  14. only on ic die. and some are not true multi emitter, but just two bonded leads to the same emitter.
  15. https://en.m.wikipedia.org/wiki/Multiple-emitter_transistor
  16. article in edn covers what bob pease has for a circuit. similar to ti data sheet with transistor, but drives
  17. constant current for an led