Not much anymore. You're living in the past ;-) when process variations were much greater.
Manufacturer to manufacturer... now that's a different story.
Jan doesn't understand that what happens in a typical RF stage, AGC'd that way, is the input impedance pads down the gain.
Not a chance, I don't rely on beta period!
...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
I did a 3-opamp 6-pole SK filter with AD8628s. That seems to be an especially bad configuration... one opamp input has a cap to ground and the other input connects to the output (unity-gain follower.) I got something like 5 uv offset per amp. Had to add a tiny trimpot to tweak the overall offset to zero. This was for some little plug-in filter boardlets.
Next time, I'll breadboard anything critical that uses a chopamp; the data sheets don't generally mention charge injection.
-- John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation
Sometimes they do come clean, e.g.
Cheers
Phil Hobbs
-- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 USA +1 845 480 2058 hobbs at electrooptical dot net http://electrooptical.net
Thanks. The paint can is cool.
-- John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.