Yep, use you recommended BCV62C SOT23 current mirror as the core plus any old transistors to make the cascode portion. ...Jim Thompson
-- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 |
The only BCV62 matching spec is 0.7 / 1.3x current matching, corresponding to an about 10mV voltage offset matching spec. This is 5 to 10x worse than the parts in my Table 8.1b (such as the BCM857 and DMMT3906), and I think that's why I left those parts out of the table. They're also pre-wired as mirrors, limiting their application.
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Thanks,
- Win
If it runs away at 25 mW, it'll have about 10% nonlinearity at 2.5 mW. If t hat's good enough precision for the application, fine. I'm usually trying f or something quite a bit better than that.
Cheers
Phil Hobbs
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